diff --git a/Changelog b/Changelog
index 9a4524b08..05df50d85 100644
--- a/Changelog
+++ b/Changelog
@@ -1315,7 +1315,7 @@
      * The net tracer now allows to use layer combinations (derived by boolean operations)
        for the conductive and via layers. See The Net Tracing Feature for details.
      * A technology management is integrated into Klayout.
-       That allows to switch various settings depending on the choosen technology.
+       That allows to switch various settings depending on the chosen technology.
        See About Technology Management for details about this feature.
      * The drawing can now be rotated or flipped without having to modify the layout.
        This function can be found in the "Display" menu under "Global Transformation".
@@ -1865,7 +1865,7 @@
      * The instance browser now has a "Choose cell" button where the cell can be
        chosen whose instances will be presented.
      * For most editing operations, the status bar will now indicate more detailed
-       informations such as move distance.
+       information such as move distance.
      * Pasted shapes and instances now are selected initially.
      * Enhanced OASIS compression mode (can be chosen from the options dialog on
        saving). Reduces file size considerably by creating regular shape arrays if
diff --git a/src/ant/ant/antService.cc b/src/ant/ant/antService.cc
index f2e3b6089..2fd33146d 100644
--- a/src/ant/ant/antService.cc
+++ b/src/ant/ant/antService.cc
@@ -1049,7 +1049,7 @@ Service::begin_move (lay::Editable::MoveMode mode, const db::DPoint &p, lay::ang
     double l = double (search_range) / widget ()->mouse_event_trans ().mag ();
     db::DBox search_dbox = db::DBox (p, p).enlarged (db::DVector (l, l));
 
-    //  test, wether we are moving a handle of one selected object
+    //  test, whether we are moving a handle of one selected object
     for (std::map<obj_iterator, unsigned int>::const_iterator r = m_selected.begin (); r != m_selected.end (); ++r) {
 
       obj_iterator ri = r->first;
diff --git a/src/ant/ant/gsiDeclAnt.cc b/src/ant/ant/gsiDeclAnt.cc
index af42ac044..03e9c52e8 100644
--- a/src/ant/ant/gsiDeclAnt.cc
+++ b/src/ant/ant/gsiDeclAnt.cc
@@ -897,7 +897,7 @@ gsi::Class<AnnotationRef> decl_Annotation (decl_BasicAnnotation, "lay", "Annotat
   ),
   "@brief A layout annotation (i.e. ruler)\n"
   "\n"
-  "Annotation objects provide a way to attach measurements or descriptive informations to a layout view. "
+  "Annotation objects provide a way to attach measurements or descriptive information to a layout view. "
   "Annotation objects can appear as rulers for example. Annotation objects can be configured in "
   "different ways using the styles provided. By configuring an annotation object properly, it can appear "
   "as a rectangle or a plain line for example.\n"
diff --git a/src/buddies/src/bd/bdWriterOptions.cc b/src/buddies/src/bd/bdWriterOptions.cc
index d10ac5acf..7605c389f 100644
--- a/src/buddies/src/bd/bdWriterOptions.cc
+++ b/src/buddies/src/bd/bdWriterOptions.cc
@@ -145,7 +145,7 @@ GenericWriterOptions::add_options (tl::CommandLineOptions &cmd, const std::strin
                    )
         << tl::arg (group +
                     "#--multi-xy-records", &m_gds2_multi_xy_records, "Allows unlimited number of points",
-                    "If this option is given, multiple XY records will be written to accomodate an unlimited number "
+                    "If this option is given, multiple XY records will be written to accommodate an unlimited number "
                     "of points per polygon or path. However, such files may not be compatible with some consumers."
                    )
         << tl::arg (group +
@@ -169,7 +169,7 @@ GenericWriterOptions::add_options (tl::CommandLineOptions &cmd, const std::strin
         << tl::arg (group +
                     "#!--no-timestamps", &m_gds2_write_timestamps, "Don't write timestamps",
                     "Writes a dummy time stamp instead of the actual time. With this option, GDS2 files become "
-                    "bytewise indentical even if written at different times. This option is useful if binary "
+                    "bytewise identical even if written at different times. This option is useful if binary "
                     "identity is important (i.e. in regression scenarios)."
                    )
         << tl::arg (group +
diff --git a/src/db/db/dbBox.h b/src/db/db/dbBox.h
index a3445e3cf..1e9a2e944 100644
--- a/src/db/db/dbBox.h
+++ b/src/db/db/dbBox.h
@@ -624,7 +624,7 @@ struct DB_PUBLIC_TEMPLATE box
    *  @brief Conversion to string
    *
    *  If dbu is set, it determines the factor by which the coordinates are multiplied to render
-   *  micron units. In addition, a micron format is choosen for output of these coordinates.
+   *  micron units. In addition, a micron format is chosen for output of these coordinates.
    */
   std::string to_string (double dbu) const
   {
diff --git a/src/db/db/dbCell.h b/src/db/db/dbCell.h
index 2d3574cbb..e3ab44ca8 100644
--- a/src/db/db/dbCell.h
+++ b/src/db/db/dbCell.h
@@ -60,7 +60,7 @@ class ImportLayerMapping;
  *  @brief The cell object
  * 
  *  A cell object consists of a set of shape containers (called layers),
- *  a set of child cell instances and auxiliary informations such as
+ *  a set of child cell instances and auxiliary information such as
  *  the parent instance list.
  *  A cell is identified through an index given to the cell upon instantiation.
  *  The cell index is valid in the context of a cell graph object which
diff --git a/src/db/db/dbEdge.h b/src/db/db/dbEdge.h
index 923125e52..3474a3f99 100644
--- a/src/db/db/dbEdge.h
+++ b/src/db/db/dbEdge.h
@@ -598,7 +598,7 @@ public:
    *  @brief Conversion to a string.
    *
    *  If dbu is set, it determines the factor by which the coordinates are multiplied to render
-   *  micron units. In addition, a micron format is choosen for output of these coordinates.
+   *  micron units. In addition, a micron format is chosen for output of these coordinates.
    */
   std::string to_string (double dbu) const
   {
diff --git a/src/db/db/dbEdgePair.h b/src/db/db/dbEdgePair.h
index 6704abe16..37746e8b0 100644
--- a/src/db/db/dbEdgePair.h
+++ b/src/db/db/dbEdgePair.h
@@ -306,7 +306,7 @@ public:
    *  @brief Conversion to a string.
    *
    *  If dbu is set, it determines the factor by which the coordinates are multiplied to render
-   *  micron units. In addition, a micron format is choosen for output of these coordinates.
+   *  micron units. In addition, a micron format is chosen for output of these coordinates.
    */
   std::string to_string (double dbu) const
   {
diff --git a/src/db/db/dbEdgeProcessor.h b/src/db/db/dbEdgeProcessor.h
index 2ba2521b8..f19e57e9a 100644
--- a/src/db/db/dbEdgeProcessor.h
+++ b/src/db/db/dbEdgeProcessor.h
@@ -711,7 +711,7 @@ public:
   /**
    *  @brief Merge the given edges in a simple "non-zero wrapcount" fashion
    *
-   *  The egdes provided must form valid closed contours. Contours oriented differently "cancel" each other. 
+   *  The edges provided must form valid closed contours. Contours oriented differently "cancel" each other. 
    *  Overlapping contours are merged when the orientation is the same.
    *
    *  The result is presented as a set of edges forming closed contours. Hulls are oriented clockwise while
@@ -729,7 +729,7 @@ public:
   /**
    *  @brief Merge the given edges in a simple "non-zero wrapcount" fashion into polygons
    *
-   *  The egdes provided must form valid closed contours. Contours oriented differently "cancel" each other. 
+   *  The edges provided must form valid closed contours. Contours oriented differently "cancel" each other. 
    *  Overlapping contours are merged when the orientation is the same.
    *
    *  This method produces polygons and allows to fine-tune the parameters for that purpose.
@@ -795,7 +795,7 @@ public:
    *  on the individual result polygons of the merge step. The result may contain overlapping contours, but no self-overlaps. 
    *
    *  dx and dy describe the sizing. A positive value indicates oversize (outwards) while a negative one describes undersize (inwards).
-   *  The sizing applied can be choosen differently in x and y direction. In this case, the sign must be identical for both
+   *  The sizing applied can be chosen differently in x and y direction. In this case, the sign must be identical for both
    *  dx and dy.
    *
    *  The result is presented as a set of edges forming closed contours. Hulls are oriented clockwise while
@@ -820,7 +820,7 @@ public:
    *  Polygon overlap occures if the polygons are close enough, so a positive sizing makes polygons overlap.
    *  
    *  dx and dy describe the sizing. A positive value indicates oversize (outwards) while a negative one describes undersize (inwards).
-   *  The sizing applied can be choosen differently in x and y direction. In this case, the sign must be identical for both
+   *  The sizing applied can be chosen differently in x and y direction. In this case, the sign must be identical for both
    *  dx and dy.
    *
    *  This method produces polygons and allows to fine-tune the parameters for that purpose.
diff --git a/src/db/db/dbEdges.h b/src/db/db/dbEdges.h
index 84de5a6b4..1a9fba573 100644
--- a/src/db/db/dbEdges.h
+++ b/src/db/db/dbEdges.h
@@ -976,7 +976,7 @@ public:
   /**
    *  @brief Returns edges (point-like) representing the start part of the edges
    *
-   *  The length of the part can be choosen by length or a fraction of the original length.
+   *  The length of the part can be chosen by length or a fraction of the original length.
    *  If length and fraction are 0, a point at the beginning of the edge will be created.
    *  If length is non-zero and fraction is 0, a segment in the direction of the edge
    *  with the given length is created, even if the length is larger than the original
diff --git a/src/db/db/dbHierNetworkProcessor.h b/src/db/db/dbHierNetworkProcessor.h
index 6fef35daa..0bcd6595a 100644
--- a/src/db/db/dbHierNetworkProcessor.h
+++ b/src/db/db/dbHierNetworkProcessor.h
@@ -301,7 +301,7 @@ public:
   /**
    *  @brief Adds the given attribute to the attribute set
    *
-   *  Attributes are arbitary IDs attached to clusters.
+   *  Attributes are arbitrary IDs attached to clusters.
    *  The attribute value 0 is reserved for "no attribute" and is not
    *  put into the set.
    */
diff --git a/src/db/db/dbLayerProperties.h b/src/db/db/dbLayerProperties.h
index 7a944041b..89242782e 100644
--- a/src/db/db/dbLayerProperties.h
+++ b/src/db/db/dbLayerProperties.h
@@ -138,7 +138,7 @@ struct LPLogicalLessFunc
  *  @brief A layer offset 
  *
  *  This struct defines a layer offset which can be "added" to a LayerProperties object
- *  If the layer offset is defined with a name, any occurance of '*' in the string
+ *  If the layer offset is defined with a name, any occurrence of '*' in the string
  *  is replaced with the original name. This way, applying "*_A" with "+" yields a 
  *  postfix "_A" to the original layer name (if it is named).
  */
diff --git a/src/db/db/dbLayout.cc b/src/db/db/dbLayout.cc
index 8cb3d62b8..90ba1e748 100644
--- a/src/db/db/dbLayout.cc
+++ b/src/db/db/dbLayout.cc
@@ -1304,7 +1304,7 @@ Layout::do_update ()
   try {
 
     //  if the hierarchy has been changed so far, update
-    //  the hierarchy management informations
+    //  the hierarchy management information
     if (hier_dirty ()) {
       {
         tl::SelfTimer timer (tl::verbosity () > layout_base_verbosity + 10, "Updating relations");
@@ -1324,7 +1324,7 @@ Layout::do_update ()
 
     //  if something on the bboxes (either on shape level or on 
     //  cell bbox level - i.e. by child instances) has been changed,
-    //  update the bbox informations. In addition sort the shapes
+    //  update the bbox information. In addition sort the shapes
     //  lists of region queries, since they might have changed once
     //  the bboxes are dirty.
     if (bboxes_dirty ()) {
diff --git a/src/db/db/dbLayoutStateModel.h b/src/db/db/dbLayoutStateModel.h
index 7ccc3e07f..0ea913994 100644
--- a/src/db/db/dbLayoutStateModel.h
+++ b/src/db/db/dbLayoutStateModel.h
@@ -95,7 +95,7 @@ public:
    *  @brief Invalidate the bounding boxes
    *
    *  This method is supposed to be called by shape containers for example if 
-   *  some event has occured that changed the bounding boxes.
+   *  some event has occurred that changed the bounding boxes.
    *
    *  If the index is std::numeric_limits<unsigned int>::max, this method
    *  applies to all layers.
diff --git a/src/db/db/dbLayoutToNetlist.h b/src/db/db/dbLayoutToNetlist.h
index 9bca6b617..e3f9436fe 100644
--- a/src/db/db/dbLayoutToNetlist.h
+++ b/src/db/db/dbLayoutToNetlist.h
@@ -471,7 +471,7 @@ public:
    *   * No connection indicated (circuit_cell_name_prefix == 0: the net shapes are simply put into their
    *     respective circuits. The connections are not indicated.
    *   * Subnet hierarchy (circuit_cell_name_prefix != 0): for each root net, a full hierarchy is built
-   *     to accomodate the subnets (see build_net in recursive mode).
+   *     to accommodate the subnets (see build_net in recursive mode).
    *
    *  If a device cell name prefix is given, cells will be produced for each device abstract
    *  using a name like device_cell_name_prefix + device name.
diff --git a/src/db/db/dbLayoutUtils.h b/src/db/db/dbLayoutUtils.h
index 374413772..4eecd7448 100644
--- a/src/db/db/dbLayoutUtils.h
+++ b/src/db/db/dbLayoutUtils.h
@@ -66,7 +66,7 @@ private:
 };
 
 /**
- *  @brief A property mapper based on a dynamic propery id generation
+ *  @brief A property mapper based on a dynamic property id generation
  *
  *  This class can be used as property mapper for certain "insert" flavors of
  *  the Instance and Shapes class. 
diff --git a/src/db/db/dbManager.h b/src/db/db/dbManager.h
index de523e23e..0fba9a305 100644
--- a/src/db/db/dbManager.h
+++ b/src/db/db/dbManager.h
@@ -144,7 +144,7 @@ public:
    *  @brief Undo the current transaction
    *
    *  The current transaction is undone with this method.
-   *  The 'available_undo' method can be used to determine wether
+   *  The 'available_undo' method can be used to determine whether
    *  there are transactions to undo.
    */
   void undo ();
@@ -153,7 +153,7 @@ public:
    *  @brief Redo the next available transaction
    *
    *  The next transaction is redone with this method.
-   *  The 'available_redo' method can be used to determine wether
+   *  The 'available_redo' method can be used to determine whether
    *  there are transactions to undo.
    */
   void redo ();
diff --git a/src/db/db/dbMatrix.h b/src/db/db/dbMatrix.h
index 912cce6f5..223914795 100644
--- a/src/db/db/dbMatrix.h
+++ b/src/db/db/dbMatrix.h
@@ -845,7 +845,7 @@ public:
   /**
    *  @brief Get the x perspective tilt angle in degree
    *
-   *  To achieve the same visual effect, a different tilt angle has to be choosen for 
+   *  To achieve the same visual effect, a different tilt angle has to be chosen for 
    *  a given observer distance z. This method computes the tilt angle for the given observer
    *  distance.
    */
@@ -854,7 +854,7 @@ public:
   /**
    *  @brief Get the y perspective tilt angle in degree
    *
-   *  To achieve the same visual effect, a different tilt angle has to be choosen for 
+   *  To achieve the same visual effect, a different tilt angle has to be chosen for 
    *  a given observer distance z. This method computes the tilt angle for the given observer
    *  distance.
    */
@@ -868,7 +868,7 @@ public:
   /**
    *  @brief Returns the matrix for perspective transformation
    *
-   *  To achieve the same visual effect, a different tilt angle has to be choosen for 
+   *  To achieve the same visual effect, a different tilt angle has to be chosen for 
    *  a given observer distance z. This method computes the tilt angle for the given observer
    *  distance.
    *
@@ -970,7 +970,7 @@ struct MatrixAdjustFlags
  *  @param landmarks_before The points before the transformation.
  *  @param landmarks_after The points after the transformation.
  *  @param flags Selects the properties to adjust.
- *  @param fixed_point The index of the fixed point (one that is definitly mapped to the target) or -1 if there is none
+ *  @param fixed_point The index of the fixed point (one that is definitely mapped to the target) or -1 if there is none
  */
 void DB_PUBLIC adjust_matrix (Matrix2d &matrix, db::DVector &disp, const std::vector <db::DPoint> &landmarks_before, const std::vector <db::DPoint> &landmarks_after, MatrixAdjustFlags::Flags flags, int fixed_point = -1);
 
@@ -986,7 +986,7 @@ void DB_PUBLIC adjust_matrix (Matrix2d &matrix, db::DVector &disp, const std::ve
  *  @param landmarks_before The points before the transformation.
  *  @param landmarks_after The points after the transformation.
  *  @param flags Selects the properties to adjust.
- *  @param fixed_point The index of the fixed point (one that is definitly mapped to the target) or -1 if there is none
+ *  @param fixed_point The index of the fixed point (one that is definitely mapped to the target) or -1 if there is none
  */
 void DB_PUBLIC adjust_matrix (Matrix3d &matrix, const std::vector <db::DPoint> &landmarks_before, const std::vector <db::DPoint> &landmarks_after, MatrixAdjustFlags::Flags flags, int fixed_point = -1);
 
diff --git a/src/db/db/dbMetaInfo.h b/src/db/db/dbMetaInfo.h
index a3f92a552..b304c3a27 100644
--- a/src/db/db/dbMetaInfo.h
+++ b/src/db/db/dbMetaInfo.h
@@ -34,7 +34,7 @@ namespace db
 /**
  *  @brief A structure describing the meta information from the reader
  *
- *  In the meta information block, the reader provides additional informations
+ *  In the meta information block, the reader provides additional information
  *  about the file and content etc.
  *  "name" is a unique name that can be used to identify the information.
  *  "description" is a "speaking" description of the information.
diff --git a/src/db/db/dbNet.h b/src/db/db/dbNet.h
index 6baa895b9..39227c3a7 100644
--- a/src/db/db/dbNet.h
+++ b/src/db/db/dbNet.h
@@ -446,7 +446,7 @@ public:
   /**
    *  @brief Gets the qualified name
    *
-   *  The qualified name is like the expanded name, but preceeded with the
+   *  The qualified name is like the expanded name, but preceded with the
    *  Circuit name if known (e.g. "CIRCUIT:NET")
    */
   std::string qname () const;
diff --git a/src/db/db/dbNetlistDeviceExtractor.h b/src/db/db/dbNetlistDeviceExtractor.h
index eba997f58..ed82c0266 100644
--- a/src/db/db/dbNetlistDeviceExtractor.h
+++ b/src/db/db/dbNetlistDeviceExtractor.h
@@ -123,7 +123,7 @@ public:
   }
 
   /**
-   *  @brief Gets the cell name the error occured in
+   *  @brief Gets the cell name the error occurred in
    */
   const std::string &cell_name () const
   {
diff --git a/src/db/db/dbPoint.h b/src/db/db/dbPoint.h
index 23c157afa..8e64e065e 100644
--- a/src/db/db/dbPoint.h
+++ b/src/db/db/dbPoint.h
@@ -270,7 +270,7 @@ public:
    *  @brief String conversion
    *
    *  If dbu is set, it determines the factor by which the coordinates are multiplied to render
-   *  micron units. In addition, a micron format is choosen for output of these coordinates.
+   *  micron units. In addition, a micron format is chosen for output of these coordinates.
    */
   std::string
   to_string (double dbu) const 
diff --git a/src/db/db/dbPolygonTools.h b/src/db/db/dbPolygonTools.h
index 0f915cd0d..b58df1475 100644
--- a/src/db/db/dbPolygonTools.h
+++ b/src/db/db/dbPolygonTools.h
@@ -118,7 +118,7 @@ void cut_polygon (const PolygonType &input, const typename PolygonType::edge_typ
  *  @brief Split a polygon into two or more parts 
  *
  *  This function splits a polygon into parts using some heuristics to determine a "suitable" cut line.
- *  The cut line is choosen through a vertex close to a center (either horizontal or vertical). The splitting
+ *  The cut line is chosen through a vertex close to a center (either horizontal or vertical). The splitting
  *  is supposed to create smaller parts with less vertices or a better area ratio of polygon to bounding box area.
  *
  *  @param polygon The input polygon
diff --git a/src/db/db/dbShapes.h b/src/db/db/dbShapes.h
index bc5100f8f..4be48048b 100644
--- a/src/db/db/dbShapes.h
+++ b/src/db/db/dbShapes.h
@@ -208,7 +208,7 @@ public:
    *  @param box The region to select
    *  @param mode See above
    *  @param flags The kind of shapes to iterate over (or-ed constants of flags_type)
-   *  @param prop_sel The propery selection
+   *  @param prop_sel The property selection
    *  @param inv_prop_sel True, if shapes not matching the property selection shall be reported
    */
   ShapeIterator (const shapes_type &shapes, const box_type &box, region_mode mode, unsigned int flags = All, const property_selector *prop_sel = 0, bool inv_prop_sel = false);
diff --git a/src/db/db/dbShapes2.h b/src/db/db/dbShapes2.h
index abb084086..8308ab030 100644
--- a/src/db/db/dbShapes2.h
+++ b/src/db/db/dbShapes2.h
@@ -33,10 +33,10 @@ namespace db
 /**
  *  @brief A traits class for the various shape types
  *
- *  This class provides informations about various properties of the shape class, i.e.
- *  - wether the objects must be dereferenced into standanlone containers
- *  - wether the objects are arrays, potentially using the array repository
- *  - wether the objects have properties
+ *  This class provides information about various properties of the shape class, i.e.
+ *  - whether the objects must be dereferenced into standanlone containers
+ *  - whether the objects are arrays, potentially using the array repository
+ *  - whether the objects have properties
  */
 template <class Sh> 
 struct shape_traits 
diff --git a/src/db/db/dbTilingProcessor.cc b/src/db/db/dbTilingProcessor.cc
index ac4439914..5e36ab8fe 100644
--- a/src/db/db/dbTilingProcessor.cc
+++ b/src/db/db/dbTilingProcessor.cc
@@ -910,7 +910,7 @@ TilingProcessor::execute (const std::string &desc)
   }
 
   if (job.has_error ()) {
-    throw tl::Exception (tl::to_string (tr ("Errors occured during processing. First error message says:\n")) + job.error_messages ().front ());
+    throw tl::Exception (tl::to_string (tr ("Errors occurred during processing. First error message says:\n")) + job.error_messages ().front ());
   }
 }
 
diff --git a/src/db/db/dbTrans.h b/src/db/db/dbTrans.h
index edd541894..13dc7b252 100644
--- a/src/db/db/dbTrans.h
+++ b/src/db/db/dbTrans.h
@@ -1433,7 +1433,7 @@ operator<< (std::ostream &os, const simple_trans<C> &t)
 /**
  *  @brief A complex transformation
  *
- *  A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitary
+ *  A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitrary
  *  angle and a displacement. The template parameters for this transformation are
  *  I (the input coordinate type), F (the output coordinate type) and R (the representation
  *  type used internally for representing the floating-point members).
diff --git a/src/db/db/dbTypes.h b/src/db/db/dbTypes.h
index 764e3b6bc..943e9dbfe 100644
--- a/src/db/db/dbTypes.h
+++ b/src/db/db/dbTypes.h
@@ -382,7 +382,7 @@ struct coord_traits<int64_t>
 /** 
  *  @brief Coord_traits specialisation for double coordinates 
  *
- *  The precision is choosen such that the double coordinate
+ *  The precision is chosen such that the double coordinate
  *  can represent "micrometers" with a physical resolution limit of 0.01 nm.
  *  The area precision will render reliable vector product signs for vectors
  *  of roughly up to 60 mm length.
diff --git a/src/db/db/dbVector.h b/src/db/db/dbVector.h
index 0d81a11a0..5afc470c4 100644
--- a/src/db/db/dbVector.h
+++ b/src/db/db/dbVector.h
@@ -312,7 +312,7 @@ public:
    *  @brief String conversion
    *
    *  If dbu is set, it determines the factor by which the coordinates are multiplied to render
-   *  micron units. In addition, a micron format is choosen for output of these coordinates.
+   *  micron units. In addition, a micron format is chosen for output of these coordinates.
    */
   std::string
   to_string (double dbu) const 
diff --git a/src/db/db/gsiDeclDbCell.cc b/src/db/db/gsiDeclDbCell.cc
index 92e13c342..834a5c9e2 100644
--- a/src/db/db/gsiDeclDbCell.cc
+++ b/src/db/db/gsiDeclDbCell.cc
@@ -2016,7 +2016,7 @@ Class<db::Cell> decl_Cell ("db", "Cell",
     "The algorithm supports a global fill raster as well as local (per-polygon) origin optimization. In the latter case "
     "the origin of the regular raster is optimized per individual polygon of the fill region.\n"
     "\n"
-    "A more elaborate version of this method is available which also returns informations about the non-filled parts.\n"
+    "A more elaborate version of this method is available which also returns information about the non-filled parts.\n"
     "\n"
     "This method has been introduced in version 0.23.\n"
   ) +
@@ -3060,7 +3060,7 @@ Class<db::Cell> decl_Cell ("db", "Cell",
   "@brief A cell\n"
   "\n"
   "A cell object consists of a set of shape containers (called layers),\n"
-  "a set of child cell instances and auxiliary informations such as\n"
+  "a set of child cell instances and auxiliary information such as\n"
   "the parent instance list.\n"
   "A cell is identified through an index given to the cell upon instantiation.\n"
   "Cell instances refer to single instances or array instances. Both are encapsulated in the\n"
diff --git a/src/db/db/gsiDeclDbEdge.cc b/src/db/db/gsiDeclDbEdge.cc
index 4cf150859..42beeb401 100644
--- a/src/db/db/gsiDeclDbEdge.cc
+++ b/src/db/db/gsiDeclDbEdge.cc
@@ -630,7 +630,7 @@ Class<db::Edge> decl_Edge ("db", "Edge",
   "An edge is a connection between points, usually participating in a larger context "
   "such as a polygon. An edge has a defined direction (from p1 to p2). "
   "Edges play a role in the database as parts of polygons and to describe a line through both points.\n"
-  "Altough supported, edges are rarely used as individual database objects.\n"
+  "Although supported, edges are rarely used as individual database objects.\n"
   "\n"
   "See @<a href=\"/programming/database_api.xml\">The Database API@</a> for more details about the "
   "database objects like the Edge class."
@@ -678,7 +678,7 @@ Class<db::DEdge> decl_DEdge ("db", "DEdge",
   "such as a polygon. An edge has a defined direction (from p1 to p2). "
   "Edges play a role in the database as parts of polygons and to describe a line through both points.\n"
   "The \\Edge object is also used inside the boolean processor (\\EdgeProcessor).\n"
-  "Altough supported, edges are rarely used as individual database objects.\n"
+  "Although supported, edges are rarely used as individual database objects.\n"
   "\n"
   "See @<a href=\"/programming/database_api.xml\">The Database API@</a> for more details about the "
   "database objects like the Edge class."
diff --git a/src/db/db/gsiDeclDbEdgeProcessor.cc b/src/db/db/gsiDeclDbEdgeProcessor.cc
index 0ec50f08f..f5e06e418 100644
--- a/src/db/db/gsiDeclDbEdgeProcessor.cc
+++ b/src/db/db/gsiDeclDbEdgeProcessor.cc
@@ -222,7 +222,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "This method has been added in version 0.22.\n"
     "\n"
     "The mode specifies the rule to use when producing output. A value of 0 specifies the even-odd rule. "
-    "A positive value specfies the wrap count threshold (postive only). A negative value specifies the "
+    "A positive value specifies the wrap count threshold (positive only). A negative value specifies the "
     "threshold of the absolute value of the wrap count (i.e. -1 is non-zero rule).\n"
     "\n"
     "@param mode See description\n"
@@ -268,7 +268,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "This method has been added in version 0.22.\n"
     "\n"
     "The mode specifies the rule to use when producing output. A value of 0 specifies the even-odd rule. "
-    "A positive value specfies the wrap count threshold (postive only). A negative value specifies the "
+    "A positive value specifies the wrap count threshold (positive only). A negative value specifies the "
     "threshold of the absolute value of the wrap count (i.e. -1 is non-zero rule).\n"
     "\n"
     "@param mode See description\n"
@@ -281,7 +281,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "@brief Merge the given edges in a simple \"non-zero wrapcount\" fashion\n"
     "@args in\n"
     "\n"
-    "The egdes provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
+    "The edges provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
     "Overlapping contours are merged when the orientation is the same.\n"
     "\n"
     "The result is presented as a set of edges forming closed contours. Hulls are oriented clockwise while\n"
@@ -300,7 +300,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "@brief Merge the given polygons and specify the merge mode\n"
     "@args in, mode\n"
     "\n"
-    "The egdes provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
+    "The edges provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
     "Overlapping contours are merged when the orientation is the same.\n"
     "\n"
     "The result is presented as a set of edges forming closed contours. Hulls are oriented clockwise while\n"
@@ -312,7 +312,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "This method has been added in version 0.22.\n"
     "\n"
     "The mode specifies the rule to use when producing output. A value of 0 specifies the even-odd rule. "
-    "A positive value specfies the wrap count threshold (postive only). A negative value specifies the "
+    "A positive value specifies the wrap count threshold (positive only). A negative value specifies the "
     "threshold of the absolute value of the wrap count (i.e. -1 is non-zero rule).\n"
     "\n"
     "@param mode See description\n"
@@ -323,7 +323,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "@brief Merge the given edges in a simple \"non-zero wrapcount\" fashion into polygons\n"
     "@args in, resolve_holes, min_coherence\n"
     "\n"
-    "The egdes provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
+    "The edges provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
     "Overlapping contours are merged when the orientation is the same.\n"
     "\n"
     "This method produces polygons and allows to fine-tune the parameters for that purpose.\n"
@@ -343,7 +343,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "@brief Merge the given polygons and specify the merge mode\n"
     "@args in, resolve_holes, min_coherence, mode\n"
     "\n"
-    "The egdes provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
+    "The edges provided must form valid closed contours. Contours oriented differently \"cancel\" each other. \n"
     "Overlapping contours are merged when the orientation is the same.\n"
     "\n"
     "This method produces polygons and allows to fine-tune the parameters for that purpose.\n"
@@ -354,7 +354,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "This method has been added in version 0.22.\n"
     "\n"
     "The mode specifies the rule to use when producing output. A value of 0 specifies the even-odd rule. "
-    "A positive value specfies the wrap count threshold (postive only). A negative value specifies the "
+    "A positive value specifies the wrap count threshold (positive only). A negative value specifies the "
     "threshold of the absolute value of the wrap count (i.e. -1 is non-zero rule).\n"
     "\n"
     "@param mode See description\n"
@@ -412,7 +412,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "on the individual result polygons of the merge step. The result may contain overlapping contours, but no self-overlaps. \n"
     "\n"
     "dx and dy describe the sizing. A positive value indicates oversize (outwards) while a negative one describes undersize (inwards).\n"
-    "The sizing applied can be choosen differently in x and y direction. In this case, the sign must be identical for both\n"
+    "The sizing applied can be chosen differently in x and y direction. In this case, the sign must be identical for both\n"
     "dx and dy.\n"
     "\n"
     "The 'mode' parameter describes the corner fill strategy. Mode 0 connects all corner segments directly. Mode 1 is the 'octagon' strategy in which "
@@ -441,7 +441,7 @@ Class<db::EdgeProcessor> decl_EdgeProcessor ("db", "EdgeProcessor",
     "Polygon overlap occures if the polygons are close enough, so a positive sizing makes polygons overlap.\n"
     "\n"
     "dx and dy describe the sizing. A positive value indicates oversize (outwards) while a negative one describes undersize (inwards).\n"
-    "The sizing applied can be choosen differently in x and y direction. In this case, the sign must be identical for both\n"
+    "The sizing applied can be chosen differently in x and y direction. In this case, the sign must be identical for both\n"
     "dx and dy.\n"
     "\n"
     "The 'mode' parameter describes the corner fill strategy. Mode 0 connects all corner segments directly. Mode 1 is the 'octagon' strategy in which "
diff --git a/src/db/db/gsiDeclDbEdges.cc b/src/db/db/gsiDeclDbEdges.cc
index 31a44b39e..ab583c6ff 100644
--- a/src/db/db/gsiDeclDbEdges.cc
+++ b/src/db/db/gsiDeclDbEdges.cc
@@ -423,7 +423,7 @@ Class<db::Edges> dec_Edges ("db", "Edges",
     "The edges form the contours of the polygons.\n"
   ) +
   constructor ("new", &new_a2, gsi::arg ("array"),
-    "@brief Constructor from an egde array\n"
+    "@brief Constructor from an edge array\n"
     "\n"
     "This constructor creates a region from an array of edges.\n"
   ) +
@@ -500,7 +500,7 @@ Class<db::Edges> dec_Edges ("db", "Edges",
     "\n"
     "This constructor creates an edge collection from the shapes delivered by the given recursive shape iterator.\n"
     "It feeds the shapes from a hierarchy of cells into the hierarchical edge set.\n"
-    "The edges remain within their original hierachy unless other operations require the edges to be moved in the hierarchy.\n"
+    "The edges remain within their original hierarchy unless other operations require the edges to be moved in the hierarchy.\n"
     "\n"
     "Text objects are not inserted, because they cannot be converted to edges.\n"
     "Edge objects are inserted as such. If \"as_edges\" is true, \"solid\" objects (boxes, polygons, paths) are converted to edges which "
@@ -519,7 +519,7 @@ Class<db::Edges> dec_Edges ("db", "Edges",
     "\n"
     "This constructor creates an edge collection from the shapes delivered by the given recursive shape iterator.\n"
     "It feeds the shapes from a hierarchy of cells into the hierarchical edge set.\n"
-    "The edges remain within their original hierachy unless other operations require the edges to be moved in the hierarchy.\n"
+    "The edges remain within their original hierarchy unless other operations require the edges to be moved in the hierarchy.\n"
     "The transformation is useful to scale to a specific database unit for example.\n"
     "\n"
     "Text objects are not inserted, because they cannot be converted to edges.\n"
@@ -550,7 +550,7 @@ Class<db::Edges> dec_Edges ("db", "Edges",
     "@code\n"
     "dots = RBA::Edges::new(iter, \"*\")           # all texts\n"
     "dots = RBA::Edges::new(iter, \"A*\")          # all texts starting with an 'A'\n"
-    "dots = RBA::Edges::new(iter, \"A*\", false)   # all texts exactly matchin 'A*'\n"
+    "dots = RBA::Edges::new(iter, \"A*\", false)   # all texts exactly matching 'A*'\n"
     "@/code\n"
     "\n"
     "This method has been introduced in version 0.26.\n"
@@ -571,7 +571,7 @@ Class<db::Edges> dec_Edges ("db", "Edges",
     "@code\n"
     "region = RBA::Region::new(iter, dss, \"*\")           # all texts\n"
     "region = RBA::Region::new(iter, dss, \"A*\")          # all texts starting with an 'A'\n"
-    "region = RBA::Region::new(iter, dss, \"A*\", false)   # all texts exactly matchin 'A*'\n"
+    "region = RBA::Region::new(iter, dss, \"A*\", false)   # all texts exactly matching 'A*'\n"
     "@/code\n"
     "\n"
     "This method has been introduced in version 0.26.\n"
diff --git a/src/db/db/gsiDeclDbLayout.cc b/src/db/db/gsiDeclDbLayout.cc
index 2a6d432a3..4e5fd5ecc 100644
--- a/src/db/db/gsiDeclDbLayout.cc
+++ b/src/db/db/gsiDeclDbLayout.cc
@@ -1956,7 +1956,7 @@ Class<db::Layout> decl_Layout ("db", "Layout",
     "@brief Registers a PCell declaration under the given name\n"
     "@args name, declaration\n"
     "Registers a local PCell in the current layout. If a declaration with that name\n"
-    "alreay exists, it is replaced with the new declaration.\n"
+    "already exists, it is replaced with the new declaration.\n"
     "\n"
     "This method has been introduced in version 0.22.\n"
   ) +
diff --git a/src/db/db/gsiDeclDbLayoutToNetlist.cc b/src/db/db/gsiDeclDbLayoutToNetlist.cc
index 2ce0807eb..78860e07c 100644
--- a/src/db/db/gsiDeclDbLayoutToNetlist.cc
+++ b/src/db/db/gsiDeclDbLayoutToNetlist.cc
@@ -376,7 +376,7 @@ Class<db::LayoutToNetlist> decl_dbLayoutToNetlist ("db", "LayoutToNetlist",
     "@li No connection indicated (circuit_cell_name_prefix == 0: the net shapes are simply put into their\n"
     "   respective circuits. The connections are not indicated. @/li\n"
     "@li Subnet hierarchy (circuit_cell_name_prefix != 0): for each root net, a full hierarchy is built\n"
-    "   to accomodate the subnets (see build_net in recursive mode). @/li\n"
+    "   to accommodate the subnets (see build_net in recursive mode). @/li\n"
     "@/ul\n"
     "\n"
     "If a device name prefix is given, device shapes will be output on device cells named\n"
diff --git a/src/db/db/gsiDeclDbManager.cc b/src/db/db/gsiDeclDbManager.cc
index 2bd53bfe4..8b4033598 100644
--- a/src/db/db/gsiDeclDbManager.cc
+++ b/src/db/db/gsiDeclDbManager.cc
@@ -93,14 +93,14 @@ Class<db::Manager> decl_Manager ("db", "Manager",
     "@brief Undo the current transaction\n"
     "\n"
     "The current transaction is undone with this method.\n"
-    "The 'has_undo' method can be used to determine wether\n"
+    "The 'has_undo' method can be used to determine whether\n"
     "there are transactions to undo.\n"
   ) +
   gsi::method ("redo", &db::Manager::redo,
     "@brief Redo the next available transaction\n"
     "\n"
     "The next transaction is redone with this method.\n"
-    "The 'has_redo' method can be used to determine wether\n"
+    "The 'has_redo' method can be used to determine whether\n"
     "there are transactions to undo.\n"
   ) +
   gsi::method_ext ("has_undo?", &has_undo,
diff --git a/src/db/db/gsiDeclDbMatrix.cc b/src/db/db/gsiDeclDbMatrix.cc
index 0e35bf6a2..a84ef454c 100644
--- a/src/db/db/gsiDeclDbMatrix.cc
+++ b/src/db/db/gsiDeclDbMatrix.cc
@@ -557,7 +557,7 @@ gsi::Class<db::Matrix3d> decl_Matrix3d ("db", "Matrix3d",
     "@param landmarks_before The points before the transformation.\n"
     "@param landmarks_after The points after the transformation.\n"
     "@param mode Selects the adjustment mode. Must be one of the Adjust... constants.\n"
-    "@param fixed_point The index of the fixed point (one that is definitly mapped to the target) or -1 if there is none\n"
+    "@param fixed_point The index of the fixed point (one that is definitely mapped to the target) or -1 if there is none\n"
   ) +
   gsi::method ("AdjustNone", &adjust_none,
     "@brief Mode for \\adjust: adjust nothing\n"
diff --git a/src/db/db/gsiDeclDbNetlist.cc b/src/db/db/gsiDeclDbNetlist.cc
index cbfe718bd..b51ca3394 100644
--- a/src/db/db/gsiDeclDbNetlist.cc
+++ b/src/db/db/gsiDeclDbNetlist.cc
@@ -331,7 +331,7 @@ Class<db::Net> decl_dbNet ("db", "Net",
   ) +
   gsi::method ("qname|to_s", &db::Net::qname,
     "@brief Gets the qualified name.\n"
-    "The qualified name is like the expanded name, but the circuit's name is preceeded\n"
+    "The qualified name is like the expanded name, but the circuit's name is preceded\n"
     "(i.e. 'CIRCUIT:NET') if available.\n"
   ) +
   gsi::method ("expanded_name", &db::Net::expanded_name,
@@ -878,7 +878,7 @@ Class<db::Circuit> decl_dbCircuit ("db", "Circuit",
   "A circuit has pins by which it can connect to the outside. Pins are "
   "created using \\create_pin and are represented by the \\Pin class.\n"
   "\n"
-  "Futhermore, a circuit manages the components of the netlist. "
+  "Furthermore, a circuit manages the components of the netlist. "
   "Components are devices (class \\Device) and subcircuits (class \\SubCircuit). "
   "Devices are basic devices such as resistors or transistors. Subcircuits "
   "are other circuits to which nets from this circuit connect. "
diff --git a/src/db/db/gsiDeclDbNetlistDeviceExtractor.cc b/src/db/db/gsiDeclDbNetlistDeviceExtractor.cc
index 911e40aed..a814ca1a6 100644
--- a/src/db/db/gsiDeclDbNetlistDeviceExtractor.cc
+++ b/src/db/db/gsiDeclDbNetlistDeviceExtractor.cc
@@ -154,8 +154,8 @@ Class<db::NetlistDeviceExtractorError> decl_dbNetlistDeviceExtractorError ("db",
     "@brief Sets the category description.\n"
     "See \\category_name= for details about categories."
   ),
-  "@brief An error that occured during device extraction\n"
-  "The device extractor will keep errors that occured during extraction of the devices. "
+  "@brief An error that occurred during device extraction\n"
+  "The device extractor will keep errors that occurred during extraction of the devices. "
   "It does not by using this error class.\n"
   "\n"
   "An error is basically described by the cell/circuit it occures in and the message. "
diff --git a/src/db/db/gsiDeclDbPolygon.cc b/src/db/db/gsiDeclDbPolygon.cc
index 9e2856b55..7c1fa594c 100644
--- a/src/db/db/gsiDeclDbPolygon.cc
+++ b/src/db/db/gsiDeclDbPolygon.cc
@@ -1328,7 +1328,7 @@ struct polygon_defs
       "@brief Iterate over the edges that make up the polygon\n"
       "\n"
       "This iterator will deliver all edges, including those of the holes. "
-      "Hole edges are oriented counterclockwise while hull egdes are oriented clockwise.\n"
+      "Hole edges are oriented counterclockwise while hull edges are oriented clockwise.\n"
     ) +
     iterator ("each_edge", (typename C::polygon_edge_iterator (C::*)(unsigned int) const) (&C::begin_edge), 
       "@brief Iterate over the edges of one contour of the polygon\n"
@@ -1338,7 +1338,7 @@ struct polygon_defs
       "\n"
       "This iterator will deliver all edges of the contour specified by the contour parameter. "
       "The hull has contour number 0, the first hole has contour 1 etc.\n"
-      "Hole edges are oriented counterclockwise while hull egdes are oriented clockwise.\n"
+      "Hole edges are oriented counterclockwise while hull edges are oriented clockwise.\n"
       "\n"
       "This method was introduced in version 0.24."
     ) +
diff --git a/src/db/db/gsiDeclDbRegion.cc b/src/db/db/gsiDeclDbRegion.cc
index 965fc3ce1..93bc418c2 100644
--- a/src/db/db/gsiDeclDbRegion.cc
+++ b/src/db/db/gsiDeclDbRegion.cc
@@ -729,7 +729,7 @@ Class<db::Region> decl_Region ("db", "Region",
     "@code\n"
     "region = RBA::Region::new(iter, \"*\")           # all texts\n"
     "region = RBA::Region::new(iter, \"A*\")          # all texts starting with an 'A'\n"
-    "region = RBA::Region::new(iter, \"A*\", false)   # all texts exactly matchin 'A*'\n"
+    "region = RBA::Region::new(iter, \"A*\", false)   # all texts exactly matching 'A*'\n"
     "@/code\n"
     "\n"
     "This method has been introduced in version 0.25. The enlargement parameter has been added in version 0.26.\n"
@@ -751,7 +751,7 @@ Class<db::Region> decl_Region ("db", "Region",
     "@code\n"
     "region = RBA::Region::new(iter, dss, \"*\")           # all texts\n"
     "region = RBA::Region::new(iter, dss, \"A*\")          # all texts starting with an 'A'\n"
-    "region = RBA::Region::new(iter, dss, \"A*\", false)   # all texts exactly matchin 'A*'\n"
+    "region = RBA::Region::new(iter, dss, \"A*\", false)   # all texts exactly matching 'A*'\n"
     "@/code\n"
     "\n"
     "This variant has been introduced in version 0.26.\n"
diff --git a/src/db/db/gsiDeclDbShape.cc b/src/db/db/gsiDeclDbShape.cc
index eb9aa128f..ef6f41dd0 100644
--- a/src/db/db/gsiDeclDbShape.cc
+++ b/src/db/db/gsiDeclDbShape.cc
@@ -1365,7 +1365,7 @@ Class<db::Shape> decl_Shape ("db", "Shape",
     "@brief Iterates over the edges of the object\n"
     "\n"
     "This method applies to polygons and simple polygons and delivers all edges that form the polygon's contours. "
-    "Hole edges are oriented counterclockwise while hull egdes are oriented clockwise.\n"
+    "Hole edges are oriented counterclockwise while hull edges are oriented clockwise.\n"
     "\n"
     "It will throw an exception if the object is not a polygon.\n"
   ) +
@@ -1383,7 +1383,7 @@ Class<db::Shape> decl_Shape ("db", "Shape",
     "\n"
     "This method applies to polygons and simple polygons and delivers all edges that form the given contour of the polygon. "
     "The hull has contour number 0, the first hole has contour 1 etc.\n"
-    "Hole edges are oriented counterclockwise while hull egdes are oriented clockwise.\n"
+    "Hole edges are oriented counterclockwise while hull edges are oriented clockwise.\n"
     "\n"
     "It will throw an exception if the object is not a polygon.\n"
     "\n"
diff --git a/src/db/db/gsiDeclDbText.cc b/src/db/db/gsiDeclDbText.cc
index 2d7630068..b0fe4a18f 100644
--- a/src/db/db/gsiDeclDbText.cc
+++ b/src/db/db/gsiDeclDbText.cc
@@ -412,7 +412,7 @@ Class<db::Text> decl_Text ("db", "Text",
   "A text object has a point (location), a text, a text transformation,\n"
   "a text size and a font id. Text size and font id are provided to be\n"
   "be able to render the text correctly.\n"
-  "Text objects are used as labels (i.e. for pins) or to indiciate a particular position.\n"
+  "Text objects are used as labels (i.e. for pins) or to indicate a particular position.\n"
   "\n"
   "The \\Text class uses integer coordinates. A class that operates with floating-point coordinates "
   "is \\DText.\n"
@@ -462,7 +462,7 @@ Class<db::DText> decl_DText ("db", "DText",
   "A text object has a point (location), a text, a text transformation,\n"
   "a text size and a font id. Text size and font id are provided to be\n"
   "be able to render the text correctly.\n"
-  "Text objects are used as labels (i.e. for pins) or to indiciate a particular position.\n"
+  "Text objects are used as labels (i.e. for pins) or to indicate a particular position.\n"
   "\n"
   "The \\DText class uses floating-point coordinates. A class that operates with integer coordinates "
   "is \\Text.\n"
diff --git a/src/db/db/gsiDeclDbTrans.cc b/src/db/db/gsiDeclDbTrans.cc
index 8216c00f8..191b37597 100644
--- a/src/db/db/gsiDeclDbTrans.cc
+++ b/src/db/db/gsiDeclDbTrans.cc
@@ -1040,7 +1040,7 @@ Class<db::DCplxTrans> decl_DCplxTrans ("db", "DCplxTrans",
   cplx_trans_defs<db::DCplxTrans>::methods (),
   "@brief A complex transformation\n"
   "\n"
-  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitary\n"
+  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitrary\n"
   "angle and a displacement. This is also the order, the operations are applied.\n"
   "\n"
   "A complex transformation provides a superset of the simple transformation.\n"
@@ -1129,7 +1129,7 @@ Class<db::CplxTrans> decl_CplxTrans ("db", "CplxTrans",
   cplx_trans_defs<db::CplxTrans>::methods (),
   "@brief A complex transformation\n"
   "\n"
-  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitary\n"
+  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitrary\n"
   "angle and a displacement. This is also the order, the operations are applied.\n"
   "This version can transform integer-coordinate objects into floating-point coordinate objects. "
   "This is the generic and exact case, for example for non-integer magnifications.\n"
@@ -1212,7 +1212,7 @@ Class<db::ICplxTrans> decl_ICplxTrans ("db", "ICplxTrans",
   cplx_trans_defs<db::ICplxTrans>::methods (),
   "@brief A complex transformation\n"
   "\n"
-  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitary\n"
+  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitrary\n"
   "angle and a displacement. This is also the order, the operations are applied.\n"
   "This version can transform integer-coordinate objects into the same, which may involve rounding and can be inexact.\n"
   "\n"
@@ -1294,7 +1294,7 @@ Class<db::VCplxTrans> decl_VCplxTrans ("db", "VCplxTrans",
   cplx_trans_defs<db::VCplxTrans>::methods (),
   "@brief A complex transformation\n"
   "\n"
-  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitary\n"
+  "A complex transformation provides magnification, mirroring at the x-axis, rotation by an arbitrary\n"
   "angle and a displacement. This is also the order, the operations are applied.\n"
   "This version can transform floating point coordinate objects into integer coordinate objects, which may involve rounding and can be inexact.\n"
   "\n"
diff --git a/src/db/unit_tests/dbLayout.cc b/src/db/unit_tests/dbLayout.cc
index 37f6b0de1..ac4c8655e 100644
--- a/src/db/unit_tests/dbLayout.cc
+++ b/src/db/unit_tests/dbLayout.cc
@@ -87,7 +87,7 @@ TEST(1)
   }
   EXPECT_EQ (m, (unsigned int) 0x04231); // c1,c5,c3,c4,c2
 
-  //  check relation informations ..
+  //  check relation information ..
   db::Cell::child_cell_iterator ch;
   db::Cell::const_iterator chi;
   db::Cell::parent_cell_iterator pa;
diff --git a/src/db/unit_tests/dbShapeRepository.cc b/src/db/unit_tests/dbShapeRepository.cc
index feb8a1bdd..2d014404d 100644
--- a/src/db/unit_tests/dbShapeRepository.cc
+++ b/src/db/unit_tests/dbShapeRepository.cc
@@ -46,7 +46,7 @@ TEST(1)
   c1.push_back (db::Point (200, 0));
   p1.assign_hull (c1.begin (), c1.end ());
 
-  //  insert two references to indentical but shifted polygons
+  //  insert two references to identical but shifted polygons
   db::PolygonRef pref1 (p1, rep);
 
   db::Polygon p2;
@@ -115,7 +115,7 @@ TEST(2)
   c1.push_back (db::Point (200, 0));
   p1.assign_hull (c1.begin (), c1.end ());
 
-  //  insert two references to indentical but shifted polygons
+  //  insert two references to identical but shifted polygons
   db::PolygonRef pr1 (p1, *rep);
 
   db::Polygon p2;
@@ -156,7 +156,7 @@ TEST(1SIMPLE)
   c1.push_back (db::Point (200, 0));
   p1.assign_hull (c1.begin (), c1.end ());
 
-  //  insert two references to indentical but shifted polygons
+  //  insert two references to identical but shifted polygons
   db::SimplePolygonRef pref1 (p1, rep);
 
   db::SimplePolygon p2;
@@ -225,7 +225,7 @@ TEST(2SIMPLE)
   c1.push_back (db::Point (200, 0));
   p1.assign_hull (c1.begin (), c1.end ());
 
-  //  insert two references to indentical but shifted polygons
+  //  insert two references to identical but shifted polygons
   db::SimplePolygonRef pr1 (p1, *rep);
 
   db::SimplePolygon p2;
diff --git a/src/drc/drc/built-in-macros/drc.lym b/src/drc/drc/built-in-macros/drc.lym
index 9de7b23dd..e087638cb 100644
--- a/src/drc/drc/built-in-macros/drc.lym
+++ b/src/drc/drc/built-in-macros/drc.lym
@@ -1365,7 +1365,7 @@ CODE
     # borders of the polygons of the second operand.
     #
     # The following images show the effect of the "and" method
-    # on polygons and egdes (layer1: red, layer2: blue):
+    # on polygons and edges (layer1: red, layer2: blue):
     #
     # @table
     #   @tr 
@@ -1392,7 +1392,7 @@ CODE
     # of the second operand.
     #
     # The following images show the effect of the "not" method
-    # on polygons and egdes (layer1: red, layer2: blue):
+    # on polygons and edges (layer1: red, layer2: blue):
     #
     # @table
     #   @tr 
@@ -1416,7 +1416,7 @@ CODE
     # This method is available for polygon and edge layers.
     #
     # The following images show the effect of the "xor" method
-    # on polygons and egdes (layer1: red, layer2: blue):
+    # on polygons and edges (layer1: red, layer2: blue):
     #
     # @table
     #   @tr 
@@ -1439,7 +1439,7 @@ CODE
     # This method is available for polygon and edge layers.
     #
     # The following images show the effect of the "or" method
-    # on polygons and egdes (layer1: red, layer2: blue):
+    # on polygons and edges (layer1: red, layer2: blue):
     #
     # @table
     #   @tr 
@@ -1462,7 +1462,7 @@ CODE
     # This method is available for polygon, edge and edge pair layers.
     #
     # The following images show the effect of the "join" method
-    # on polygons and egdes (layer1: red, layer2: blue):
+    # on polygons and edges (layer1: red, layer2: blue):
     #
     # @table
     #   @tr 
diff --git a/src/edt/edt/RoundCornerOptionsDialog.ui b/src/edt/edt/RoundCornerOptionsDialog.ui
index d614f6e43..bd9144a68 100644
--- a/src/edt/edt/RoundCornerOptionsDialog.ui
+++ b/src/edt/edt/RoundCornerOptionsDialog.ui
@@ -54,7 +54,7 @@
     <widget class="QLabel" name="label_4" >
      <property name="text" >
       <string>Radius to apply on polygon corners
-(Radius for inner corners can be specified seperately.
+(Radius for inner corners can be specified separately.
 Leave empty to get the same radius than for outer corners)</string>
      </property>
     </widget>
diff --git a/src/edt/edt/edtMainService.cc b/src/edt/edt/edtMainService.cc
index fc848c3b3..975293cfc 100644
--- a/src/edt/edt/edtMainService.cc
+++ b/src/edt/edt/edtMainService.cc
@@ -228,7 +228,7 @@ MainService::cm_descend ()
     throw tl::Exception (tl::to_string (QObject::tr ("Select an object to determine into which instance to descend")));
   }
   if (! common_inst.valid () || common_inst.ambigous ()) {
-    throw tl::Exception (tl::to_string (QObject::tr ("Selection is ambigous - cannot determine into which instance to descend")));
+    throw tl::Exception (tl::to_string (QObject::tr ("Selection is ambiguous - cannot determine into which instance to descend")));
   }
 
   //  remove the common path and create a new set of selections
diff --git a/src/gsi/gsi/gsiCallback.h b/src/gsi/gsi/gsiCallback.h
index bb5814426..546e3e3c0 100644
--- a/src/gsi/gsi/gsiCallback.h
+++ b/src/gsi/gsi/gsiCallback.h
@@ -47,7 +47,7 @@ struct GSI_PUBLIC Callee
 /**
  *  @brief Callback connector object
  *
- *  This object holds informations about the actual implementation of the callback 
+ *  This object holds information about the actual implementation of the callback 
  *  on the scripting client's side.
  */
 struct Callback
diff --git a/src/gsi/gsi/gsiDeclInternal.cc b/src/gsi/gsi/gsiDeclInternal.cc
index 333ce940c..a055d17a4 100644
--- a/src/gsi/gsi/gsiDeclInternal.cc
+++ b/src/gsi/gsi/gsiDeclInternal.cc
@@ -42,7 +42,7 @@ namespace gsi
 {
 
 // ---------------------------------------------------------------
-//  Access to the internal informations of GSI
+//  Access to the internal information of GSI
 
 static int t_void () { return T_void; }
 static int t_bool () { return T_bool; }
diff --git a/src/gsi/gsi/gsiMethods.h b/src/gsi/gsi/gsiMethods.h
index 9d214ef6f..f3bb7faad 100644
--- a/src/gsi/gsi/gsiMethods.h
+++ b/src/gsi/gsi/gsiMethods.h
@@ -63,7 +63,7 @@ struct IncompatibleReturnTypeException
  *
  *  A class declaration collects objects of this kind to represent methods and their specific
  *  implementation.
- *  This class is implemented in various specific ways that bind the abstract call to a specifc
+ *  This class is implemented in various specific ways that bind the abstract call to a specific
  *  C++ method.
  */
 class GSI_PUBLIC MethodBase 
diff --git a/src/gsi/gsi/gsiTypes.h b/src/gsi/gsi/gsiTypes.h
index 4f4065285..22a941d09 100644
--- a/src/gsi/gsi/gsiTypes.h
+++ b/src/gsi/gsi/gsiTypes.h
@@ -1451,7 +1451,7 @@ struct compute_pass_obj<arg_pass_ownership, X>
  *
  *  The type declaration carries the basic type code and flags, if the argument 
  *  is an iterator delivering the given types of a vector of the given types and
- *  adds class informations if the type is "T_object", "T_object_ref", "T_object_cref". 
+ *  adds class information if the type is "T_object", "T_object_ref", "T_object_cref". 
  */
 class GSI_PUBLIC ArgType
 {
diff --git a/src/img/img/gsiDeclImg.cc b/src/img/img/gsiDeclImg.cc
index 218a962bf..400409985 100644
--- a/src/img/img/gsiDeclImg.cc
+++ b/src/img/img/gsiDeclImg.cc
@@ -484,7 +484,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
     "line by line. Each line must consist of \"w\" values where the first value is the leftmost pixel.\n"
     "Note, that the rows are oriented in the mathematical sense (first one is the lowest) contrary to \n"
     "the common convention for image data.\n"
-    "Initially the pixel width and heigt will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
+    "Initially the pixel width and height will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
     "To adjust the data range use the \\min_value and \\max_value properties.\n"
     "\n"
     "@param w The width of the image\n"
@@ -499,7 +499,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
     "line by line. Each line must consist of \"w\" values where the first value is the leftmost pixel.\n"
     "Note, that the rows are oriented in the mathematical sense (first one is the lowest) contrary to \n"
     "the common convention for image data.\n"
-    "Initially the pixel width and heigt will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
+    "Initially the pixel width and height will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
     "To adjust the data range use the \\min_value and \\max_value properties.\n"
     "\n"
     "@param w The width of the image\n"
@@ -518,7 +518,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
     "and so on. Note, that the rows are oriented in the mathematical sense (first one is the lowest) contrary to \n"
     "the common convention for image data.\n"
     "The data fields can be accessed with the \"data\", \"set_data\", \"pixel\" or \"set_pixel\" methods.\n"
-    "Initially the pixel width and heigt will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
+    "Initially the pixel width and height will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
     "\n"
     "@param w The width of the image\n"
     "@param h The height of the image\n"
@@ -534,7 +534,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
     "and so on. Note, that the rows are oriented in the mathematical sense (first one is the lowest) contrary to \n"
     "the common convention for image data.\n"
     "The data fields can be accessed with the \"data\", \"set_data\", \"pixel\" or \"set_pixel\" methods.\n"
-    "Initially the pixel width and heigt will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
+    "Initially the pixel width and height will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
     "\n"
     "@param w The width of the image\n"
     "@param h The height of the image\n"
@@ -550,7 +550,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
     "line by line and separated by color channel. Each line must consist of \"w\" values where the first value is the leftmost pixel.\n"
     "Note, that the rows are oriented in the mathematical sense (first one is the lowest) contrary to \n"
     "the common convention for image data.\n"
-    "Initially the pixel width and heigt will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
+    "Initially the pixel width and height will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
     "To adjust the data range use the \\min_value and \\max_value properties.\n"
     "\n"
     "@param w The width of the image\n"
@@ -567,7 +567,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
     "line by line and separated by color channel. Each line must consist of \"w\" values where the first value is the leftmost pixel.\n"
     "Note, that the rows are oriented in the mathematical sense (first one is the lowest) contrary to \n"
     "the common convention for image data.\n"
-    "Initially the pixel width and heigt will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
+    "Initially the pixel width and height will be 1 micron and the data range will be 0 to 1.0 (black to white level). \n"
     "To adjust the data range use the \\min_value and \\max_value properties.\n"
     "\n"
     "@param w The width of the image\n"
@@ -931,7 +931,7 @@ gsi::Class<ImageRef> decl_Image (decl_BasicImage, "lay", "Image",
   "view automatically once the image object has been inserted into a view. "
   "Note that changes are not immediately reflected in the view, but are delayed until the view is refreshed. "
   "Hence, iterating the view's images will not render the same results than the image objects attached to the view. "
-  "To ensure synchonization, call \\Image#update."
+  "To ensure synchronization, call \\Image#update."
 );
 
 /**
diff --git a/src/img/img/imgObject.cc b/src/img/img/imgObject.cc
index ad67989ed..bcb9cc081 100644
--- a/src/img/img/imgObject.cc
+++ b/src/img/img/imgObject.cc
@@ -189,7 +189,7 @@ DataMapping::create_data_mapping (bool monochrome, double xmin, double xmax, uns
       int h2, s2, v2;
       false_color_nodes [i].second.getHsv (&h2, &s2, &v2);
 
-      //  The number of steps is choosen such that the full HSV band divides into approximately 200 steps
+      //  The number of steps is chosen such that the full HSV band divides into approximately 200 steps
       double nsteps = 0.5 * sqrt (double (h1 - h2) * double (h1 - h2) + double (s1 - s2) * double (s1 - s2) + double (v1 - v2) * double (v1 - v2));
       int n = int (floor (nsteps + 1.0));
       double dx = (false_color_nodes [i].first - false_color_nodes [i - 1].first) / n;
diff --git a/src/img/img/imgService.cc b/src/img/img/imgService.cc
index 5c2519d69..0df792140 100644
--- a/src/img/img/imgService.cc
+++ b/src/img/img/imgService.cc
@@ -618,7 +618,7 @@ Service::begin_move (lay::Editable::MoveMode mode, const db::DPoint &p, lay::ang
 
   } else if (mode == lay::Editable::Partial) {
   
-    //  test, wether we are moving a handle of one selected object
+    //  test, whether we are moving a handle of one selected object
     for (std::map<obj_iterator, unsigned int>::const_iterator s = m_selected.begin (); s != m_selected.end (); ++s) {
 
       MoveMode mm = move_none;
diff --git a/src/lay/lay/MainConfigPage5.ui b/src/lay/lay/MainConfigPage5.ui
index 0ca0c2990..71fe01c67 100644
--- a/src/lay/lay/MainConfigPage5.ui
+++ b/src/lay/lay/MainConfigPage5.ui
@@ -34,7 +34,7 @@
       <item row="0" column="0" colspan="2" >
        <widget class="QLabel" name="label_2" >
         <property name="text" >
-         <string>Specifiy the number of digits to be used for displaying ...</string>
+         <string>Specify the number of digits to be used for displaying ...</string>
         </property>
         <property name="wordWrap" >
          <bool>true</bool>
diff --git a/src/lay/lay/SearchReplaceDialog.ui b/src/lay/lay/SearchReplaceDialog.ui
index 9996e3f6e..67a89a6ca 100644
--- a/src/lay/lay/SearchReplaceDialog.ui
+++ b/src/lay/lay/SearchReplaceDialog.ui
@@ -995,7 +995,7 @@ Press 'Select+Replace' button to show items found, select some and replace them<
               <item>
                <widget class="QLabel" name="label_9" >
                 <property name="text" >
-                 <string>Press 'Execute' button to excute the query</string>
+                 <string>Press 'Execute' button to execute the query</string>
                 </property>
                 <property name="alignment" >
                  <set>Qt::AlignCenter</set>
diff --git a/src/lay/lay/doc/about/about_libraries.xml b/src/lay/lay/doc/about/about_libraries.xml
index a6b37ce0f..b7cfafcdb 100644
--- a/src/lay/lay/doc/about/about_libraries.xml
+++ b/src/lay/lay/doc/about/about_libraries.xml
@@ -26,7 +26,7 @@
   <p>
   When a layout containing library references is saved, KLayout stores
   some meta information in that file which allows it to restore the
-  library links and related informations.
+  library links and related information.
   For GDS, that meta information is stored in a separate top cell. For OASIS,
   the meta information is stored in special per-cell properties.
   For other formats, the meta information is not stored currently.
diff --git a/src/lay/lay/doc/about/about_pcells.xml b/src/lay/lay/doc/about/about_pcells.xml
index bcbcf0341..a8bdad290 100644
--- a/src/lay/lay/doc/about/about_pcells.xml
+++ b/src/lay/lay/doc/about/about_pcells.xml
@@ -60,7 +60,7 @@
   <p>
   PCell's are usually packed in libraries. PCell libraries can be provided as
   shared objects/DLL's (in C++) or as Ruby scripts. Because PCell code is only executed if
-  required, performance usally is not the main objective. A Ruby implementation
+  required, performance usually is not the main objective. A Ruby implementation
   will therefore be sufficient in most cases and
   is a much easier to maintain. The Ruby approach also benefits from KLayout's integrated development
   environment.
diff --git a/src/lay/lay/doc/about/basic_lib.xml b/src/lay/lay/doc/about/basic_lib.xml
index 9fe84e2b5..2d08969ff 100644
--- a/src/lay/lay/doc/about/basic_lib.xml
+++ b/src/lay/lay/doc/about/basic_lib.xml
@@ -106,7 +106,7 @@
   </p>
   
   <p>When a shape is converted to a donut, the shape's bounding box will be used to define the
-  enclosing box of the donut and the hole's diameter will be choosen to be half of the outer
+  enclosing box of the donut and the hole's diameter will be chosen to be half of the outer
   diameter.
   </p>
 
@@ -136,7 +136,7 @@
   The PCell features a parameter that defines the radius. The path itself
   can be manipulated as usual, in particular with partial edit mode.
   Path objects can be converted to ROUND_PATH pcells. In that case, the initial radius
-  will be choosen to be roughly 10 percent of the minimum bounding box dimensions
+  will be chosen to be roughly 10 percent of the minimum bounding box dimensions
   of the original path.
   </p>
 
@@ -154,7 +154,7 @@
   The PCell features a parameter that defines the radius. The polygon itself
   can be manipulated as usual, in particular with partial edit mode.
   Polygon, box or path objects can be converted to ROUND_POLYGON pcells. In that case, the initial radius
-  will be choosen to be roughly 10 percent of the minimum bounding box dimensions
+  will be chosen to be roughly 10 percent of the minimum bounding box dimensions
   of the original polygon.
   </p>
 
@@ -173,7 +173,7 @@
   The PCell features two parameters that define the radius and width of the "rim" line. 
   The polygon or box itself can be manipulated as usual.
   Polygon, box or path objects can be converted to STROKED_POLYGON or STROKED_BOX pcells. 
-  In that case, the initial radius will be zero. The width of the rim line will be choosen
+  In that case, the initial radius will be zero. The width of the rim line will be chosen
   to be roughly 10 percent of the minimum bounding box dimensions of the original polygon.
   For STROKED_BOX, the bounding box of the original shape will be used as the basic shape.
   </p>
diff --git a/src/lay/lay/doc/about/connectivity.xml b/src/lay/lay/doc/about/connectivity.xml
index 7cc65fad4..1118c2211 100644
--- a/src/lay/lay/doc/about/connectivity.xml
+++ b/src/lay/lay/doc/about/connectivity.xml
@@ -50,7 +50,7 @@
   <p>
   By creating conductor layers with boolean expressions, it is possible for example to separate an active area
   layer of a CMOS transistor into source and drain regions by subtracting the gate poly. Symbolic layers are useful
-  to use "speaking" names for layers instead of the numeric layer/datatype specificiation.
+  to use "speaking" names for layers instead of the numeric layer/datatype specification.
   Please note, that the net tracer is considerably slower when using boolean expressions.
   </p>
 
diff --git a/src/lay/lay/doc/about/drc_ref_layer.xml b/src/lay/lay/doc/about/drc_ref_layer.xml
index e6639416a..36b76860f 100644
--- a/src/lay/lay/doc/about/drc_ref_layer.xml
+++ b/src/lay/lay/doc/about/drc_ref_layer.xml
@@ -76,7 +76,7 @@ result will be the edges of the first operand which are inside or on the
 borders of the polygons of the second operand.
 </p><p>
 The following images show the effect of the "and" method
-on polygons and egdes (layer1: red, layer2: blue):
+on polygons and edges (layer1: red, layer2: blue):
 </p><p>
 <table>
 <tr>
@@ -847,7 +847,7 @@ It is an alias for the "+" operator.
 This method is available for polygon, edge and edge pair layers.
 </p><p>
 The following images show the effect of the "join" method
-on polygons and egdes (layer1: red, layer2: blue):
+on polygons and edges (layer1: red, layer2: blue):
 </p><p>
 <table>
 <tr>
@@ -1017,7 +1017,7 @@ result will be the edges of the first operand which are outside the polygons
 of the second operand.
 </p><p>
 The following images show the effect of the "not" method
-on polygons and egdes (layer1: red, layer2: blue):
+on polygons and edges (layer1: red, layer2: blue):
 </p><p>
 <table>
 <tr>
@@ -1203,7 +1203,7 @@ It is an alias for the "|" operator.
 This method is available for polygon and edge layers.
 </p><p>
 The following images show the effect of the "or" method
-on polygons and egdes (layer1: red, layer2: blue):
+on polygons and edges (layer1: red, layer2: blue):
 </p><p>
 <table>
 <tr>
@@ -2321,7 +2321,7 @@ It is an alias for the "^" operator.
 This method is available for polygon and edge layers.
 </p><p>
 The following images show the effect of the "xor" method
-on polygons and egdes (layer1: red, layer2: blue):
+on polygons and edges (layer1: red, layer2: blue):
 </p><p>
 <table>
 <tr>
diff --git a/src/lay/lay/doc/about/lef_def_import.xml b/src/lay/lay/doc/about/lef_def_import.xml
index bf0ed8073..e19d9a85f 100644
--- a/src/lay/lay/doc/about/lef_def_import.xml
+++ b/src/lay/lay/doc/about/lef_def_import.xml
@@ -136,7 +136,7 @@
 
   <ul>
     <li><b>Produce net names:</b> Check this option to assign user properties with the
-      net name to the net shapes in DEF files. The user propery name used for that
+      net name to the net shapes in DEF files. The user property name used for that
       purpose can be specified in the edit box below the check box. Use KLayout's 
       variant notation (see <link href="about/variant_notation.xml"/>) to specify
       value and type of the property name.
diff --git a/src/lay/lay/doc/manual/copypaste_cell.xml b/src/lay/lay/doc/manual/copypaste_cell.xml
index 70b4b2721..519e7ebf5 100644
--- a/src/lay/lay/doc/manual/copypaste_cell.xml
+++ b/src/lay/lay/doc/manual/copypaste_cell.xml
@@ -15,7 +15,7 @@
   </p>
 
   <p>
-  Two copy modes are provided: deep and shallow copy. When "copy" or "cut" is choosen and 
+  Two copy modes are provided: deep and shallow copy. When "copy" or "cut" is chosen and 
   the cell instantiates other cells, a dialog will been shown in which the mode can be selected:
   </p>
 
diff --git a/src/lay/lay/doc/manual/create_variants.xml b/src/lay/lay/doc/manual/create_variants.xml
index d251b12db..b6fa60f6a 100644
--- a/src/lay/lay/doc/manual/create_variants.xml
+++ b/src/lay/lay/doc/manual/create_variants.xml
@@ -42,7 +42,7 @@
   <p>
   This is the initial situation: a cell is instantiated 9 times in a 3x3 array and one shape
   inside one of these instances is selected. The two following screenshots show the full-level
-  hierarchy view and just the top level hiearchy to demonstrate that the cell is placed 
+  hierarchy view and just the top level hierarchy to demonstrate that the cell is placed 
   9 times.
   </p>
 
diff --git a/src/lay/lay/doc/manual/marker_browser.xml b/src/lay/lay/doc/manual/marker_browser.xml
index 971c1dbd6..cb4e79272 100644
--- a/src/lay/lay/doc/manual/marker_browser.xml
+++ b/src/lay/lay/doc/manual/marker_browser.xml
@@ -18,7 +18,7 @@
   items. Usually, a value is a collection of geometrical objects which somehow flag
   some position or drawn geometry. Multiple of such values comprise a "marker item". 
   The report database associates these marker items with
-  additional informations:</p>
+  additional information:</p>
 
   <ul>
     <li><b>Tags:</b> Flags that indicate certain conditions. The marker browser uses
@@ -102,7 +102,7 @@
   properties. Tagged values are generated by certain generators and can represent 
   measurement values or similar. When tagged values are present, they will be shown 
   in the markers list. The markers can be sorted by these values by clicking on the 
-  approriate header.
+  appropriate header.
   </p>
 
 </doc>
diff --git a/src/lay/lay/doc/programming/application_api.xml b/src/lay/lay/doc/programming/application_api.xml
index 6d3dfab73..ed9b252ee 100644
--- a/src/lay/lay/doc/programming/application_api.xml
+++ b/src/lay/lay/doc/programming/application_api.xml
@@ -119,7 +119,7 @@
     <li><class_doc href="MainWindow#reader_options"/>: gets the current layout reader options and allows modification of the latter. 
       The reader options configure the reading of layouts.</li>
     <li><class_doc href="MainWindow#save_session"/> and <class_doc href="MainWindow#restore_session"/>: save or restore a session. 
-      Sessions contain a window settings and informations about the layouts loaded. 
+      Sessions contain a window settings and information about the layouts loaded. 
       Sessions allows storing and restoring of the state of the main window.</li>
     <li><class_doc href="MainWindow#select_view"/>: switches to the given tab. This equivalent to using <class_doc href="MainWindow#current_view_index="/>.</li>
     <li><class_doc href="MainWindow#view"/>: gets the <class_doc href="LayoutView"/> object for a given tab index.</li>
diff --git a/src/lay/lay/doc/programming/database_api.xml b/src/lay/lay/doc/programming/database_api.xml
index c451b1d59..68e8fa466 100644
--- a/src/lay/lay/doc/programming/database_api.xml
+++ b/src/lay/lay/doc/programming/database_api.xml
@@ -1046,11 +1046,11 @@ end</pre>
 
   <p>
   With version 0.23, new collection objects entered the stage: <class_doc href="Region"/>, <class_doc href="Edges"/> and
-  <class_doc href="EdgePairs"/> which basically provide a way to store polygons, edges or egde pair objects 
+  <class_doc href="EdgePairs"/> which basically provide a way to store polygons, edges or edge pair objects 
   independently from the shapes container. They are mainly used to implement bulk operations, specifically for
   the DRC functionality. The cooperate with the shapes container in the sense that they can be inserted into 
   a shapes container which will produce polygons or edges in the layout database (edge pairs are converted to single
-  egdes or polygons. These classes are discussed in <link href="/programming/geometry_api.xml"/>.
+  edges or polygons. These classes are discussed in <link href="/programming/geometry_api.xml"/>.
   </p>
 
   <h2>The Shape class</h2>
diff --git a/src/lay/lay/doc/programming/introduction.xml b/src/lay/lay/doc/programming/introduction.xml
index 359b47c41..dcc1fbd03 100644
--- a/src/lay/lay/doc/programming/introduction.xml
+++ b/src/lay/lay/doc/programming/introduction.xml
@@ -159,7 +159,7 @@ end</pre>
   <p>
   The layout view is the representation of a layout tab (<class_doc href="LayoutView"/>). That is basically the window to 
   the layouts loaded into that tab. 
-  All related information such as the display settings, the zoom area, the layer properties and the informations about the 
+  All related information such as the display settings, the zoom area, the layer properties and the information about the 
   cell shown, the hierarchy levels and further settings go here. 
   </p>
 
diff --git a/src/lay/lay/doc/programming/qt_binding.xml b/src/lay/lay/doc/programming/qt_binding.xml
index 9a44da650..718040e47 100644
--- a/src/lay/lay/doc/programming/qt_binding.xml
+++ b/src/lay/lay/doc/programming/qt_binding.xml
@@ -215,7 +215,7 @@ end</pre>
   Starting with version 0.24, the <tt>QFlags</tt> template is supported as a separate class.
   The name of the class indicates the relationship to the enum class.
   For example, <tt>QFlags&lt;QMessageBox::Icon&gt;</tt> is available as <tt>QMessageBox_QFlags_Icon</tt>.
-  Enum classes are derived from their respective flags class, so they can serve to initialize aguments
+  Enum classes are derived from their respective flags class, so they can serve to initialize arguments
   expecting flags.
   It's hardly required to operate with the flags classes directly, since they are created automatically
   when joining enum's with the "or" (<tt>|</tt>) operator:
diff --git a/src/lay/lay/doc/programming/ruby_pcells.xml b/src/lay/lay/doc/programming/ruby_pcells.xml
index 5be23513b..30af4b3a6 100644
--- a/src/lay/lay/doc/programming/ruby_pcells.xml
+++ b/src/lay/lay/doc/programming/ruby_pcells.xml
@@ -226,7 +226,7 @@ end</pre>
   having to write "RBA::" in front of the class names.
   </p>
   
-  <p>The initialization of the object is alreay a very important step. First, it 
+  <p>The initialization of the object is already a very important step. First, it 
   must initialize the super class. Then it has to declare the PCell parameters.
   Each PCell has a set of parameters that define the appearance of the PCell.
   Parameters have a symbolic name, a type, a description and optionally a default
diff --git a/src/lay/lay/gsiDeclLayApplication.cc b/src/lay/lay/gsiDeclLayApplication.cc
index fbd8e9375..f99fc7e63 100644
--- a/src/lay/lay/gsiDeclLayApplication.cc
+++ b/src/lay/lay/gsiDeclLayApplication.cc
@@ -170,7 +170,7 @@ static gsi::Methods application_methods ()
       "@return A value indicating whether the operation was successful\n"
       "\n"
       "This method siletly does nothing, if the config file does not\n"
-      "exist. If it does and an error occured, the error message is printed\n"
+      "exist. If it does and an error occurred, the error message is printed\n"
       "on stderr. In both cases, false is returned.\n"
     ) +
     method<C, lay::MainWindow *> ("main_window", &C::main_window,
diff --git a/src/lay/lay/layApplication.cc b/src/lay/lay/layApplication.cc
index 412da9d3d..4d26993e9 100644
--- a/src/lay/lay/layApplication.cc
+++ b/src/lay/lay/layApplication.cc
@@ -170,7 +170,7 @@ static void ui_exception_handler_def (QWidget *parent)
   if (! parent) {
     parent = QApplication::activeWindow () ? QApplication::activeWindow () : lay::MainWindow::instance ();
   }
-  QMessageBox::critical (parent, QObject::tr ("Error"), QObject::tr ("An unspecific error occured")); 
+  QMessageBox::critical (parent, QObject::tr ("Error"), QObject::tr ("An unspecific error occurred")); 
 }
 
 // --------------------------------------------------------------------------------
diff --git a/src/lay/lay/layApplication.h b/src/lay/lay/layApplication.h
index 6d8224498..40cb2d1a9 100644
--- a/src/lay/lay/layApplication.h
+++ b/src/lay/lay/layApplication.h
@@ -183,7 +183,7 @@ public:
    *  @brief Read the configuration from a file
    *
    *  This method siletly does nothing, if the config file does not
-   *  exist. If it does and an error occured, the error message is printed
+   *  exist. If it does and an error occurred, the error message is printed
    *  on stderr. In both cases, false is returned.
    */
   bool read_config (const std::string &config_file);
diff --git a/src/lay/lay/laySaltDownloadManager.h b/src/lay/lay/laySaltDownloadManager.h
index 57de7f287..3dd13cc78 100644
--- a/src/lay/lay/laySaltDownloadManager.h
+++ b/src/lay/lay/laySaltDownloadManager.h
@@ -99,7 +99,7 @@ public:
   /**
    *  @brief Registers an URL (with version) for download in the given target directory
    *
-   *  The target directory can be empty. In this case, the downloader will pick an approriate one.
+   *  The target directory can be empty. In this case, the downloader will pick an appropriate one.
    */
   void register_download (const std::string &name, const std::string &token, const std::string &url, const std::string &version);
 
diff --git a/src/lay/lay/layVersion.h b/src/lay/lay/layVersion.h
index d6d5c2909..6cfcd9f55 100644
--- a/src/lay/lay/layVersion.h
+++ b/src/lay/lay/layVersion.h
@@ -29,7 +29,7 @@
 namespace lay {
 
 /**
- *  @brief This class provides the program's version informations
+ *  @brief This class provides the program's version information
  */
 
 class LAY_PUBLIC Version
diff --git a/src/lay/lay/macro_templates/qt_designer.lym b/src/lay/lay/macro_templates/qt_designer.lym
index 773b58225..d26b3a01b 100644
--- a/src/lay/lay/macro_templates/qt_designer.lym
+++ b/src/lay/lay/macro_templates/qt_designer.lym
@@ -17,7 +17,7 @@
   # load the UI file
   # TODO: this is how to load a file from a path next to the .lym file
   # ui_file = QFile::new(QFileInfo::new($0).dir.filePath("MyDialog.ui"))
-  # Initially we use the sample file provided as resoure
+  # Initially we use the sample file provided as resource
   ui_file = QFile::new(":/macro-templates/qt_designer.ui")
   ui_file.open(QIODevice::ReadOnly)
   dialog = QFormBuilder::new.load(ui_file, Application::instance.main_window)
diff --git a/src/lay/lay/syntax/ruby.xml b/src/lay/lay/syntax/ruby.xml
index 4b60a1951..8749d159a 100644
--- a/src/lay/lay/syntax/ruby.xml
+++ b/src/lay/lay/syntax/ruby.xml
@@ -313,7 +313,7 @@
 			<!-- In the following contexts, a slash character ('/') is a division operator -->
 			<!-- Everywhere else, it's a regular expression delimiter -->
 
-			<!-- A slash is always a division operator, even if preceeded by whitespace -->
+			<!-- A slash is always a division operator, even if preceded by whitespace -->
 			<context name="check_div_1" attribute="Normal Text" fallthrough="true" fallthroughContext="#pop" lineEndContext="#pop">
 				<RegExpr attribute="Normal Text" String="\s*" context="#stay"/>
 				<AnyChar attribute="Operator" String="/%" context="#pop"/>
@@ -325,7 +325,7 @@
 				<AnyChar attribute="Operator" String="/%" context="#pop#pop"/>
 			</context>
 
-			<!-- A slash is division operator if it's the first character, or if preceeded and followed by whitespace -->
+			<!-- A slash is division operator if it's the first character, or if preceded and followed by whitespace -->
 			<context name="check_div_2" attribute="Normal Text" fallthrough="true" fallthroughContext="#pop" lineEndContext="#pop">
 				<AnyChar attribute="Operator" String="/%" context="#pop"/>
 				<RegExpr attribute="Normal Text" String="\s+" context="check_div_2_internal"/>
diff --git a/src/laybasic/laybasic/gsiDeclLayDialogs.cc b/src/laybasic/laybasic/gsiDeclLayDialogs.cc
index 2d05e86d4..fb9a62d3a 100644
--- a/src/laybasic/laybasic/gsiDeclLayDialogs.cc
+++ b/src/laybasic/laybasic/gsiDeclLayDialogs.cc
@@ -360,7 +360,7 @@ Class<BrowserDialog_Stub> decl_BrowserDialog (QT_EXTERNAL_BASE (QDialog) "lay",
     "@brief Reloads the current page"
   ) +
   gsi::method ("home=|#set_home", &BrowserDialog_Stub::set_home, 
-    "@brief Sets the browser's initial and current URL which is selected if the \"home\" location is choosen\n"
+    "@brief Sets the browser's initial and current URL which is selected if the \"home\" location is chosen\n"
     "@args home_url\n"
     "The home URL is the one shown initially and the one which is selected when the \"home\" button is pressed. "
     "The default location is \"int:/index.html\".\n"
@@ -513,7 +513,7 @@ Class<lay::BrowserPanel> decl_BrowserPanel (QT_EXTERNAL_BASE (QWidget) "lay", "B
     "@brief Reloads the current page"
   ) +
   gsi::method ("home=", &lay::BrowserPanel::set_home, 
-    "@brief Sets the browser widget's initial and current URL which is selected if the \"home\" location is choosen\n"
+    "@brief Sets the browser widget's initial and current URL which is selected if the \"home\" location is chosen\n"
     "@args home_url\n"
     "The home URL is the one shown initially and the one which is selected when the \"home\" button is pressed. "
     "The default location is \"int:/index.html\".\n"
@@ -726,7 +726,7 @@ Class<InputDialog> decl_InputDialog ("lay", "InputDialog",
     "@param title The title to display for the dialog\n"
     "@param label The label text to display for the dialog\n"
     "@param items The list of items to show in the selection element\n"
-    "@param selection The initial selection (index of the element selected intially)\n"
+    "@param selection The initial selection (index of the element selected initially)\n"
     "@return A \\StringValue object with has_value? set to true, if \"Ok\" was pressed and the value given in it's value attribute\n"
     "Starting from 0.22, this method is deprecated and it is recommended to use the ask_... equivalent."
   ) +
diff --git a/src/laybasic/laybasic/gsiDeclLayLayers.cc b/src/laybasic/laybasic/gsiDeclLayLayers.cc
index 9b49a9036..38721d5cd 100644
--- a/src/laybasic/laybasic/gsiDeclLayLayers.cc
+++ b/src/laybasic/laybasic/gsiDeclLayLayers.cc
@@ -978,7 +978,7 @@ Class<lay::LayerProperties> decl_LayerProperties ("lay", "LayerProperties",
     "This is the hierarchy level at which the drawing starts. "
     "This property is only meaningful, if \\has_upper_hier_level is true. "
     "The hierarchy level can be relative in which case, 0 refers to the context cell's level. "
-    "A mode can be specfied for the hierarchy level which is 0 for absolute, 1 for minimum "
+    "A mode can be specified for the hierarchy level which is 0 for absolute, 1 for minimum "
     "of specified level and set level and 2 for maximum of specified level and set level. "
   ) +
   method_ext ("upper_hier_level", &get_upper_hier_level_1, 
@@ -1069,7 +1069,7 @@ Class<lay::LayerProperties> decl_LayerProperties ("lay", "LayerProperties",
     "This is the hierarchy level at which the drawing starts. "
     "This property is only meaningful, if \\has_lower_hier_level is true. "
     "The hierarchy level can be relative in which case, 0 refers to the context cell's level. "
-    "A mode can be specfied for the hierarchy level which is 0 for absolute, 1 for minimum "
+    "A mode can be specified for the hierarchy level which is 0 for absolute, 1 for minimum "
     "of specified level and set level and 2 for maximum of specified level and set level. "
   ) +
   method_ext ("lower_hier_level", &get_lower_hier_level_1, 
diff --git a/src/laybasic/laybasic/gsiDeclLayLayoutView.cc b/src/laybasic/laybasic/gsiDeclLayLayoutView.cc
index a140bd1d3..2b0741d51 100644
--- a/src/laybasic/laybasic/gsiDeclLayLayoutView.cc
+++ b/src/laybasic/laybasic/gsiDeclLayLayoutView.cc
@@ -676,7 +676,7 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "current path is returned for the cellview given by cv_index.\n"
     "The cell path is a list of cell indices from the top cell to the current cell.\n"
     "\n"
-    "@param cv_index The cellview index for which to get the current path from (usally this will be the active cellview index)"
+    "@param cv_index The cellview index for which to get the current path from (usually this will be the active cellview index)"
     "\n"
     "This method is was deprecated in version 0.25 since from then, the \\CellView object can be used to obtain an manipulate the selected cell."
   ) +
@@ -684,10 +684,10 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "@brief Sets the path to the current cell\n"
     "\n"
     "The current cell is the one highlighted in the browser with the focus rectangle. The\n"
-    "cell given by the path is hightlighted and scrolled into view.\n"
+    "cell given by the path is highlighted and scrolled into view.\n"
     "To select the cell to be drawn, use the \\select_cell or \\select_cell_path method.\n"
     "\n"
-    "@param cv_index The cellview index for which to set the current path for (usally this will be the active cellview index)\n"
+    "@param cv_index The cellview index for which to set the current path for (usually this will be the active cellview index)\n"
     "@param path The path to the current cell\n"
     "\n"
     "This method is was deprecated in version 0.25 since from then, the \\CellView object can be used to obtain an manipulate the selected cell."
@@ -1020,7 +1020,7 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "\n"
     "This method inserts the new properties node before the position given by \"iter\" and returns "
     "a const reference to the element created. The iterator that specified the position will remain valid "
-    "after the node was inserted and will point to the newly created node. It can be used to add futher nodes. "
+    "after the node was inserted and will point to the newly created node. It can be used to add further nodes. "
     "To add children to the node inserted, use iter.last_child as insertion point for the next insert operations.\n"
     "\n"
     "Since version 0.22, this method accepts LayerProperties and LayerPropertiesNode objects. A LayerPropertiesNode "
@@ -1034,7 +1034,7 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "This version addresses a specific list in a multi-tab layer properties arrangement with the \"index\" parameter. "
     "This method inserts the new properties node before the position given by \"iter\" and returns "
     "a const reference to the element created. The iterator that specified the position will remain valid "
-    "after the node was inserted and will point to the newly created node. It can be used to add futher nodes. "
+    "after the node was inserted and will point to the newly created node. It can be used to add further nodes. "
     "\n"
     "This method has been introduced in version 0.21.\n"
     "Since version 0.22, this method accepts LayerProperties and LayerPropertiesNode objects. A LayerPropertiesNode "
@@ -1104,7 +1104,7 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "This iterator delivers the layers of this view, either in a recursive or non-recursive\n"
     "fashion, depending which iterator increment methods are used.\n"
     "The iterator delivered by \\end_layers is the past-the-end iterator. It can be compared\n"
-    "agains a current iterator to check, if there are no further elements.\n"
+    "against a current iterator to check, if there are no further elements.\n"
     "\n"
     "Starting from version 0.25, an alternative solution is provided with 'each_layer' which is based on the "
     "\\LayerPropertiesNodeRef class."
@@ -1119,7 +1119,7 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "This iterator delivers the layers of this view, either in a recursive or non-recursive\n"
     "fashion, depending which iterator increment methods are used.\n"
     "The iterator delivered by \\end_layers is the past-the-end iterator. It can be compared\n"
-    "agains a current iterator to check, if there are no further elements.\n"
+    "against a current iterator to check, if there are no further elements.\n"
     "This version addresses a specific list in a multi-tab layer properties arrangement with the \"index\" parameter. "
     "This method has been introduced in version 0.21.\n"
   ) +
@@ -1497,7 +1497,7 @@ Class<lay::LayoutView> decl_LayoutView (QT_EXTERNAL_BASE (QWidget) "lay", "Layou
     "A transaction brackets a sequence of database modifications that appear as a single "
     "undo action. Only modifications that are wrapped inside a transaction..commit call pair "
     "can be undone.\n"
-    "Each transaction must be terminated with a \\commit method call, even if some error occured. "
+    "Each transaction must be terminated with a \\commit method call, even if some error occurred. "
     "It is advisable therefore to catch errors and issue a commit call in this case.\n"
     "\n"
     "This method was introduced in version 0.16."
diff --git a/src/laybasic/laybasic/gsiDeclLayMenu.cc b/src/laybasic/laybasic/gsiDeclLayMenu.cc
index 6f201ff46..680843b7f 100644
--- a/src/laybasic/laybasic/gsiDeclLayMenu.cc
+++ b/src/laybasic/laybasic/gsiDeclLayMenu.cc
@@ -123,7 +123,7 @@ Class<lay::AbstractMenu> decl_AbstractMenu ("lay", "AbstractMenu",
   "\n"
   "@<table>\n"
   "  @<tr>@<td>\"\"                 @</td>@<td>is the root@</td>@</tr> \n"
-  "  @<tr>@<td>\"[<path>.]<name>\"  @</td>@<td>is an element of the submenu given by <path>. If <path> is ommitted, this refers to an element in the root@</td>@</tr> \n"
+  "  @<tr>@<td>\"[<path>.]<name>\"  @</td>@<td>is an element of the submenu given by <path>. If <path> is omitted, this refers to an element in the root@</td>@</tr> \n"
   "  @<tr>@<td>\"[<path>.]end\"     @</td>@<td>refers to the item past the last item of the submenu given by <path> or root@</td>@</tr>\n"
   "  @<tr>@<td>\"[<path>.]begin\"   @</td>@<td>refers to the first item of the submenu given by <path> or root@</td>@</tr>\n"
   "  @<tr>@<td>\"[<path>.]#<n>\"    @</td>@<td>refers to the nth item of the submenu given by <path> or root (n is an integer number)@</td>@</tr>\n"
diff --git a/src/laybasic/laybasic/gsiDeclLayPlugin.cc b/src/laybasic/laybasic/gsiDeclLayPlugin.cc
index b14b279f4..abe341542 100644
--- a/src/laybasic/laybasic/gsiDeclLayPlugin.cc
+++ b/src/laybasic/laybasic/gsiDeclLayPlugin.cc
@@ -905,7 +905,7 @@ Class<lay::PluginRoot> decl_PluginRoot ("lay", "PluginRoot",
     "@return A value indicating whether the operation was successful\n"
     "\n"
     "This method siletly does nothing, if the config file does not\n"
-    "exist. If it does and an error occured, the error message is printed\n"
+    "exist. If it does and an error occurred, the error message is printed\n"
     "on stderr. In both cases, false is returned.\n"
   ) +
   method_ext ("get_config", &get_config,
diff --git a/src/laybasic/laybasic/layAbstractMenu.h b/src/laybasic/laybasic/layAbstractMenu.h
index 6c043987e..8dde74a17 100644
--- a/src/laybasic/laybasic/layAbstractMenu.h
+++ b/src/laybasic/laybasic/layAbstractMenu.h
@@ -624,7 +624,7 @@ private:
  *  Menu items and submenus are referred to by a "path". The path is a string with this interpretation:
  *
  *    ""                 is the root 
- *    "[<path>.]<name>"  is an element of the submenu given by <path>. If <path> is ommitted, this refers to 
+ *    "[<path>.]<name>"  is an element of the submenu given by <path>. If <path> is omitted, this refers to 
  *                       an element in the root 
  *    "[<path>.]end      refers to the item past the last item of the submenu given by <path> or root
  *    "[<path>.]begin    refers to the first item of the submenu given by <path> or root
diff --git a/src/laybasic/laybasic/layBitmapRenderer.h b/src/laybasic/laybasic/layBitmapRenderer.h
index 43f3aba01..5ccfb70ed 100644
--- a/src/laybasic/laybasic/layBitmapRenderer.h
+++ b/src/laybasic/laybasic/layBitmapRenderer.h
@@ -37,7 +37,7 @@ namespace lay
  *  The renderer is supposed to render a set of edges to
  *  one or more bitmaps. One bitmap holds the contour
  *  information, one the fill. A third one holds the 
- *  vertex informations (dots).
+ *  vertex information (dots).
  *  
  *  The intended use model is first to reserve a number of
  *  points if necessary, the fill the renderer with the
diff --git a/src/laybasic/laybasic/layBitmapsToImage.cc b/src/laybasic/laybasic/layBitmapsToImage.cc
index 2399397be..1aeb7f8d7 100644
--- a/src/laybasic/laybasic/layBitmapsToImage.cc
+++ b/src/laybasic/laybasic/layBitmapsToImage.cc
@@ -534,7 +534,7 @@ bitmaps_to_image_rgb (const std::vector<lay::ViewOp> &view_ops_in,
 
     } 
 
-    //  Collect all necessary informations to transfer a single scanline ..
+    //  Collect all necessary information to transfer a single scanline ..
     
     masks.erase (masks.begin (), masks.end ());
 
diff --git a/src/laybasic/laybasic/layDitherPattern.h b/src/laybasic/laybasic/layDitherPattern.h
index c3010ab48..a643a1e3c 100644
--- a/src/laybasic/laybasic/layDitherPattern.h
+++ b/src/laybasic/laybasic/layDitherPattern.h
@@ -140,7 +140,7 @@ public:
    *  The pattern returned is guaranteed to be at least of
    *  size (32*pattern_stride)x64 bits. If the actual width or height is smaller,
    *  the pattern is repeated to fill this area.
-   *  The pattern stride may be bigger than 1 to accomodate pattern with
+   *  The pattern stride may be bigger than 1 to accommodate pattern with
    *  a width that is not a fraction of 32. Such pattern are repeated until
    *  they fill a multiple of 32 bits.
    */
diff --git a/src/laybasic/laybasic/layEditable.h b/src/laybasic/laybasic/layEditable.h
index 66b8d1738..7f80e4e8a 100644
--- a/src/laybasic/laybasic/layEditable.h
+++ b/src/laybasic/laybasic/layEditable.h
@@ -136,7 +136,7 @@ public:
    *  proximity is a typical distance value of the point to the closest
    *  object in micron. The plugin with the least point selection proximity
    *  is selected first for the actual "select" operation.
-   *  If a plugin definitly wants to get the selection, it should return
+   *  If a plugin definitely wants to get the selection, it should return
    *  a negative value. If the plugin is only weakly interested in a selection,
    *  it should return the value provided by the default implementation.
    *  The click_proximity method can be used to implement cycling through
@@ -186,7 +186,7 @@ public:
    *  This method is used by the single-point selection cycling protocol to clear the 
    *  plugin's single-point selection state. The cycling protocol is used when a certain
    *  point is clicked at multiple times. A plugin is supposed to remember such selections and
-   *  exlcude them from futher checks. If all objects in question are selected, no further 
+   *  exlcude them from further checks. If all objects in question are selected, no further 
    *  object would be selected. clear_previous_selection is called in that case to indicate that
    *  the previous selection should be cleared and a new cycle is about to begin
    */
diff --git a/src/laybasic/laybasic/layLayerProperties.cc b/src/laybasic/laybasic/layLayerProperties.cc
index dc91e6b62..eb5c6c6b5 100644
--- a/src/laybasic/laybasic/layLayerProperties.cc
+++ b/src/laybasic/laybasic/layLayerProperties.cc
@@ -1438,7 +1438,7 @@ LayerPropertiesList::expand (const std::map<int, int> &map_cv_index, bool add_de
 
     }
 
-    //  erase the items specfied to removal (cv mapping to -1)
+    //  erase the items specified to removal (cv mapping to -1)
     for (std::set<int>::const_iterator cv = cvrefs_to_erase.begin (); cv != cvrefs_to_erase.end (); ++cv) {
       remove_cv_references (*cv, false);
     }
diff --git a/src/laybasic/laybasic/layLayoutView.cc b/src/laybasic/laybasic/layLayoutView.cc
index 1612bf292..ad3d84879 100644
--- a/src/laybasic/laybasic/layLayoutView.cc
+++ b/src/laybasic/laybasic/layLayoutView.cc
@@ -2613,7 +2613,7 @@ LayoutView::add_new_layers (const std::vector <unsigned int> &layer_ids, int cv_
     lay::LayerPropertiesList new_props (get_properties ());
 
     //  don't create new layers for those, for which there are layers already: compute a 
-    //  set of layers alreay present
+    //  set of layers already present
     std::set <db::LayerProperties, db::LPLogicalLessFunc> present_layers;
     for (LayerPropertiesConstIterator lay_iter = begin_layers (); ! lay_iter.at_end (); ++lay_iter) {
       if (! lay_iter->has_children () && lay_iter->cellview_index () == cv_index) {
@@ -4279,7 +4279,7 @@ LayoutView::max_hier_changed (int i)
 }
 
 /**
- *  @brief set the maximum hierachy level to the number of levels available
+ *  @brief set the maximum hierarchy level to the number of levels available
  */
 void 
 LayoutView::max_hier ()
diff --git a/src/laybasic/laybasic/layLayoutView.h b/src/laybasic/laybasic/layLayoutView.h
index afffc8d7c..e66a687b3 100644
--- a/src/laybasic/laybasic/layLayoutView.h
+++ b/src/laybasic/laybasic/layLayoutView.h
@@ -1451,7 +1451,7 @@ public:
    *  @brief Set the path to the current cell
    *
    *  The current cell is the one highlighted in the browser with the focus rectangle. The
-   *  cell given by the path is hightlighted and scrolled into view.
+   *  cell given by the path is highlighted and scrolled into view.
    */
   void set_current_cell_path (int cv_index, const cell_path_type &path);
   
diff --git a/src/laybasic/laybasic/layLineStyles.h b/src/laybasic/laybasic/layLineStyles.h
index 4a2197306..890e5eb50 100644
--- a/src/laybasic/laybasic/layLineStyles.h
+++ b/src/laybasic/laybasic/layLineStyles.h
@@ -132,7 +132,7 @@ public:
    *  The pattern returned is guaranteed to be at least of
    *  size (32*pattern_stride)x64 bits. If the actual width or height is smaller,
    *  the pattern is repeated to fill this area.
-   *  The pattern stride may be bigger than 1 to accomodate pattern with
+   *  The pattern stride may be bigger than 1 to accommodate pattern with
    *  a width that is not a fraction of 32. Such pattern are repeated until
    *  they fill a multiple of 32 bits.
    */
diff --git a/src/laybasic/laybasic/layPlugin.h b/src/laybasic/laybasic/layPlugin.h
index 709aa1227..1b037aaae 100644
--- a/src/laybasic/laybasic/layPlugin.h
+++ b/src/laybasic/laybasic/layPlugin.h
@@ -818,7 +818,7 @@ public:
    *  If the configuration file cannot be written, false
    *  is returned but no exception is thrown.
    *
-   *  @return false, if an error occured.
+   *  @return false, if an error occurred.
    */
   bool write_config (const std::string &config_file);
 
@@ -826,10 +826,10 @@ public:
    *  @brief Read the configuration from a file
    *
    *  This method siletly does nothing, if the config file does not
-   *  exist. If it does and an error occured, the error message is printed
+   *  exist. If it does and an error occurred, the error message is printed
    *  on stderr. In both cases, false is returned.
    *
-   *  @return false, if an error occured.
+   *  @return false, if an error occurred.
    */
   bool read_config (const std::string &config_file);
 
diff --git a/src/laybasic/laybasic/layRenderer.h b/src/laybasic/laybasic/layRenderer.h
index 42a85b42e..24d5f5ae0 100644
--- a/src/laybasic/laybasic/layRenderer.h
+++ b/src/laybasic/laybasic/layRenderer.h
@@ -51,7 +51,7 @@ class CanvasPlane;
  *  The renderer is supposed to render a set of edges to
  *  one or more bitmaps. One bitmap holds the contour
  *  information, one the fill. A third one holds the 
- *  vertex informations (dots).
+ *  vertex information (dots).
  *  
  *  The intended use model is first to reserve a number of
  *  points if necessary, the fill the renderer with the
diff --git a/src/lym/lym/lymMacro.cc b/src/lym/lym/lymMacro.cc
index 1eb7b27e9..503465d25 100644
--- a/src/lym/lym/lymMacro.cc
+++ b/src/lym/lym/lymMacro.cc
@@ -954,7 +954,7 @@ void Macro::install_doc () const
       } else if (ex.test ("@method") || (st = ex.test ("@static_method")) == true) {
 
         if (cls == 0) {
-          tl::error << tl::to_string (QObject::tr ("Reading class doc from ")) << path () << ": " << tl::to_string (QObject::tr ("@method without preceeding @class"));
+          tl::error << tl::to_string (QObject::tr ("Reading class doc from ")) << path () << ": " << tl::to_string (QObject::tr ("@method without preceding @class"));
         } else {
 
           std::string n;
diff --git a/src/plugins/streamers/cif/db_plugin/dbCIF.h b/src/plugins/streamers/cif/db_plugin/dbCIF.h
index b524d3a00..f7d98f750 100644
--- a/src/plugins/streamers/cif/db_plugin/dbCIF.h
+++ b/src/plugins/streamers/cif/db_plugin/dbCIF.h
@@ -46,12 +46,12 @@ public:
   virtual ~CIFDiagnostics ();
 
   /**
-   *  @brief Issue an error with positional informations
+   *  @brief Issue an error with positional information
    */
   virtual void error (const std::string &txt) = 0;
 
   /**
-   *  @brief Issue a warning with positional informations
+   *  @brief Issue a warning with positional information
    */
   virtual void warn (const std::string &txt) = 0;
 };
diff --git a/src/plugins/streamers/cif/db_plugin/dbCIFReader.h b/src/plugins/streamers/cif/db_plugin/dbCIFReader.h
index fe560db8e..e7ef143b6 100644
--- a/src/plugins/streamers/cif/db_plugin/dbCIFReader.h
+++ b/src/plugins/streamers/cif/db_plugin/dbCIFReader.h
@@ -118,14 +118,14 @@ public:
   virtual const char *format () const { return "CIF"; }
 
   /**
-   *  @brief Issue an error with positional informations
+   *  @brief Issue an error with positional information
    *
    *  Reimplements CIFDiagnostics
    */
   virtual void error (const std::string &txt);
 
   /**
-   *  @brief Issue a warning with positional informations
+   *  @brief Issue a warning with positional information
    *
    *  Reimplements CIFDiagnostics
    */
diff --git a/src/plugins/streamers/dxf/db_plugin/dbDXF.h b/src/plugins/streamers/dxf/db_plugin/dbDXF.h
index 11fcbe9a2..699d53073 100644
--- a/src/plugins/streamers/dxf/db_plugin/dbDXF.h
+++ b/src/plugins/streamers/dxf/db_plugin/dbDXF.h
@@ -46,12 +46,12 @@ public:
   virtual ~DXFDiagnostics ();
 
   /**
-   *  @brief Issue an error with positional informations
+   *  @brief Issue an error with positional information
    */
   virtual void error (const std::string &txt) = 0;
 
   /**
-   *  @brief Issue a warning with positional informations
+   *  @brief Issue a warning with positional information
    */
   virtual void warn (const std::string &txt) = 0;
 };
diff --git a/src/plugins/streamers/dxf/db_plugin/dbDXFReader.h b/src/plugins/streamers/dxf/db_plugin/dbDXFReader.h
index 81bb70468..f3558eb61 100644
--- a/src/plugins/streamers/dxf/db_plugin/dbDXFReader.h
+++ b/src/plugins/streamers/dxf/db_plugin/dbDXFReader.h
@@ -122,14 +122,14 @@ public:
   virtual const char *format () const { return "DXF"; }
 
   /**
-   *  @brief Issue an error with positional informations
+   *  @brief Issue an error with positional information
    *
    *  Reimplements DXFDiagnostics
    */
   virtual void error (const std::string &txt);
 
   /**
-   *  @brief Issue a warning with positional informations
+   *  @brief Issue a warning with positional information
    *
    *  Reimplements DXFDiagnostics
    */
diff --git a/src/plugins/streamers/gds2/db_plugin/dbGDS2ReaderBase.cc b/src/plugins/streamers/gds2/db_plugin/dbGDS2ReaderBase.cc
index 4b59e0b5b..4a8a40c7d 100644
--- a/src/plugins/streamers/gds2/db_plugin/dbGDS2ReaderBase.cc
+++ b/src/plugins/streamers/gds2/db_plugin/dbGDS2ReaderBase.cc
@@ -343,8 +343,8 @@ GDS2ReaderBase::do_read (db::Layout &layout)
 
     get_string (m_cellname);
 
-    //  if the first cell is the dummy cell containing the context informations
-    //  read this cell in a special way and store the context informations separately.
+    //  if the first cell is the dummy cell containing the context information
+    //  read this cell in a special way and store the context information separately.
     if (first_cell && m_cellname == "$$$CONTEXT_INFO$$$") {
 
       read_context_info_cell ();
diff --git a/src/plugins/streamers/oasis/db_plugin/dbOASIS.h b/src/plugins/streamers/oasis/db_plugin/dbOASIS.h
index 1f773d862..90e7afef2 100644
--- a/src/plugins/streamers/oasis/db_plugin/dbOASIS.h
+++ b/src/plugins/streamers/oasis/db_plugin/dbOASIS.h
@@ -48,12 +48,12 @@ public:
   virtual ~OASISDiagnostics ();
 
   /**
-   *  @brief Issue an error with positional informations
+   *  @brief Issue an error with positional information
    */
   virtual void error (const std::string &txt) = 0;
 
   /**
-   *  @brief Issue a warning with positional informations
+   *  @brief Issue a warning with positional information
    */
   virtual void warn (const std::string &txt) = 0;
 };
diff --git a/src/plugins/streamers/oasis/db_plugin/dbOASISReader.cc b/src/plugins/streamers/oasis/db_plugin/dbOASISReader.cc
index ebda040e4..aa945538c 100644
--- a/src/plugins/streamers/oasis/db_plugin/dbOASISReader.cc
+++ b/src/plugins/streamers/oasis/db_plugin/dbOASISReader.cc
@@ -629,7 +629,7 @@ struct LNameJoinOp2
  *  Since CBLOCK does not update this record, the position of the table will
  *  be the location of CBLOCK rather than that of the name record itself.
  *  PAD records will also call this method, so the beginning of a table 
- *  is right after any preceeding PAD records and exactly at the location
+ *  is right after any preceding PAD records and exactly at the location
  *  of the first name record after PADs.
  */
 void 
@@ -1405,21 +1405,21 @@ OASISReader::do_read (db::Layout &layout)
 
   }
 
-  //  Check the table offsets vs. real occurance
+  //  Check the table offsets vs. real occurrence
   if (m_first_cellname != 0 && m_first_cellname != m_table_cellname && m_expect_strict_mode == 1) {
-    warn (tl::sprintf (tl::to_string (tr ("CELLNAME table offset does not match first occurance of CELLNAME in strict mode - %s vs. %s")), m_table_cellname, m_first_cellname));
+    warn (tl::sprintf (tl::to_string (tr ("CELLNAME table offset does not match first occurrence of CELLNAME in strict mode - %s vs. %s")), m_table_cellname, m_first_cellname));
   }
   if (m_first_propname != 0 && m_first_propname != m_table_propname && m_expect_strict_mode == 1) {
-    warn (tl::sprintf (tl::to_string (tr ("PROPNAME table offset does not match first occurance of PROPNAME in strict mode - %s vs. %s")), m_table_propname, m_first_propname));
+    warn (tl::sprintf (tl::to_string (tr ("PROPNAME table offset does not match first occurrence of PROPNAME in strict mode - %s vs. %s")), m_table_propname, m_first_propname));
   }
   if (m_first_propstring != 0 && m_first_propstring != m_table_propstring && m_expect_strict_mode == 1) {
-    warn (tl::sprintf (tl::to_string (tr ("PROPSTRING table offset does not match first occurance of PROPSTRING in strict mode - %s vs. %s")), m_table_propstring, m_first_propstring));
+    warn (tl::sprintf (tl::to_string (tr ("PROPSTRING table offset does not match first occurrence of PROPSTRING in strict mode - %s vs. %s")), m_table_propstring, m_first_propstring));
   }
   if (m_first_layername != 0 && m_first_layername != m_table_layername && m_expect_strict_mode == 1) {
-    warn (tl::sprintf (tl::to_string (tr ("LAYERNAME table offset does not match first occurance of LAYERNAME in strict mode - %s vs. %s")), m_table_layername, m_first_layername));
+    warn (tl::sprintf (tl::to_string (tr ("LAYERNAME table offset does not match first occurrence of LAYERNAME in strict mode - %s vs. %s")), m_table_layername, m_first_layername));
   }
   if (m_first_textstring != 0 && m_first_textstring != m_table_textstring && m_expect_strict_mode == 1) {
-    warn (tl::sprintf (tl::to_string (tr ("TEXTSTRING table offset does not match first occurance of TEXTSTRING in strict mode - %s vs. %s")), m_table_textstring, m_first_textstring));
+    warn (tl::sprintf (tl::to_string (tr ("TEXTSTRING table offset does not match first occurrence of TEXTSTRING in strict mode - %s vs. %s")), m_table_textstring, m_first_textstring));
   }
 }
 
diff --git a/src/plugins/streamers/oasis/db_plugin/dbOASISReader.h b/src/plugins/streamers/oasis/db_plugin/dbOASISReader.h
index 89344c954..3dd0c6d6f 100644
--- a/src/plugins/streamers/oasis/db_plugin/dbOASISReader.h
+++ b/src/plugins/streamers/oasis/db_plugin/dbOASISReader.h
@@ -119,14 +119,14 @@ public:
   virtual const char *format () const { return "OASIS"; }
 
   /**
-   *  @brief Issue an error with positional informations
+   *  @brief Issue an error with positional information
    *
    *  Reimplements OASISDiagnostics
    */
   virtual void error (const std::string &txt);
 
   /**
-   *  @brief Issue a warning with positional informations
+   *  @brief Issue a warning with positional information
    *
    *  Reimplements OASISDiagnostics
    */
diff --git a/src/plugins/streamers/oasis/db_plugin/gsiDeclDbOASIS.cc b/src/plugins/streamers/oasis/db_plugin/gsiDeclDbOASIS.cc
index c242be070..6f5f0f39c 100644
--- a/src/plugins/streamers/oasis/db_plugin/gsiDeclDbOASIS.cc
+++ b/src/plugins/streamers/oasis/db_plugin/gsiDeclDbOASIS.cc
@@ -290,7 +290,7 @@ gsi::ClassExt<db::SaveLayoutOptions> oasis_writer_options (
     "@args level\n"
     "The OASIS compression level is an integer number between 0 and 10. 0 basically is no compression, "
     "1 produces shape arrays in a simple fashion. 2 and higher compression levels will use a more elaborate "
-    "algorithm to find shape arrays which uses 2nd and futher neighbor distances. The higher the level, the "
+    "algorithm to find shape arrays which uses 2nd and further neighbor distances. The higher the level, the "
     "higher the memory requirements and run times.\n"
   ) +
   gsi::method_ext ("oasis_compression_level", &get_oasis_compression,
diff --git a/src/plugins/streamers/pcb/lay_plugin/GerberImportDialog.ui b/src/plugins/streamers/pcb/lay_plugin/GerberImportDialog.ui
index 423b41851..c8810c3d6 100644
--- a/src/plugins/streamers/pcb/lay_plugin/GerberImportDialog.ui
+++ b/src/plugins/streamers/pcb/lay_plugin/GerberImportDialog.ui
@@ -1076,7 +1076,7 @@ For "bottom" mounting, the top PCB layer will be assigned to the last layout lay
             <property name="text" >
              <string>Leave fields empty to specify less reference points. One point is used to derive the displacement, further points are used to derive the orientation. Currently, no magnification is implied and only simple rotations are derived from the mapping points.
 
-Alternatively the transformation (imported to existing layout) can be specified using the explicit transformation below. This allows to specify an arbitary transformation. Use the common notation (i.e. "*2 r90 10,-100").</string>
+Alternatively the transformation (imported to existing layout) can be specified using the explicit transformation below. This allows to specify an arbitrary transformation. Use the common notation (i.e. "*2 r90 10,-100").</string>
             </property>
             <property name="wordWrap" >
              <bool>true</bool>
diff --git a/src/plugins/tools/import/lay_plugin/StreamImportDialog.ui b/src/plugins/tools/import/lay_plugin/StreamImportDialog.ui
index 80e4c5fbd..c8367c49d 100644
--- a/src/plugins/tools/import/lay_plugin/StreamImportDialog.ui
+++ b/src/plugins/tools/import/lay_plugin/StreamImportDialog.ui
@@ -743,7 +743,7 @@
             <property name="text" >
              <string>Leave fields empty to specify less reference points. One point is used to derive the displacement, further points are used to derive the orientation. Currently, no magnification is implied and only simple rotations are derived from the mapping points.
 
-Alternatively the transformation (imported to existing layout) can be specified using the explicit transformation below. This allows to specify an arbitary transformation. Use the common notation (i.e. "*2 r90 10,-100").</string>
+Alternatively the transformation (imported to existing layout) can be specified using the explicit transformation below. This allows to specify an arbitrary transformation. Use the common notation (i.e. "*2 r90 10,-100").</string>
             </property>
             <property name="wordWrap" >
              <bool>true</bool>
diff --git a/src/plugins/tools/net_tracer/db_plugin/dbNetTracerIO.cc b/src/plugins/tools/net_tracer/db_plugin/dbNetTracerIO.cc
index a55ffcc23..89670d5c9 100644
--- a/src/plugins/tools/net_tracer/db_plugin/dbNetTracerIO.cc
+++ b/src/plugins/tools/net_tracer/db_plugin/dbNetTracerIO.cc
@@ -360,7 +360,7 @@ NetTracerNet::NetTracerNet (const NetTracer &tracer, const db::ICplxTrans &trans
 
   for (NetTracer::iterator s = tracer.begin (); s != tracer.end (); ++s) {
 
-    //  TODO: should reset propery ID:
+    //  TODO: should reset property ID:
     tl::ident_map<db::properties_id_type> pm;
     db::Shape new_shape = m_shapes.insert (s->shape (), trans, pm);
     m_net_shapes.push_back (*s);
diff --git a/src/plugins/tools/net_tracer/db_plugin/gsiDeclDbNetTracer.cc b/src/plugins/tools/net_tracer/db_plugin/gsiDeclDbNetTracer.cc
index a19d6a066..53bbd27c3 100644
--- a/src/plugins/tools/net_tracer/db_plugin/gsiDeclDbNetTracer.cc
+++ b/src/plugins/tools/net_tracer/db_plugin/gsiDeclDbNetTracer.cc
@@ -160,7 +160,7 @@ gsi::Class<db::NetTracerShape> decl_NetElement ("db", "NetElement",
   "In any case, the \\shape method will deliver the shape and \\trans the transformation of the shape into the original top cell. "
   "To obtain a flat representation of the net, the shapes need to be transformed by this transformation.\n"
   "\n"
-  "\\layer will give the layer the shape is located at, \\cell_index will denote the cell that containes the shape.\n"
+  "\\layer will give the layer the shape is located at, \\cell_index will denote the cell that contains the shape.\n"
   "\n"
   "This class has been introduced in version 0.25.\n"
 );
diff --git a/src/plugins/tools/xor/lay_plugin/layXORToolDialog.cc b/src/plugins/tools/xor/lay_plugin/layXORToolDialog.cc
index debaba9d6..8a4236b6e 100644
--- a/src/plugins/tools/xor/lay_plugin/layXORToolDialog.cc
+++ b/src/plugins/tools/xor/lay_plugin/layXORToolDialog.cc
@@ -84,7 +84,7 @@ struct InputModeConverter
     case IMVisible:
       return "visible";
     case IMSpecific:
-      return "specifc";
+      return "specific";
     default:
       return "";
     }
@@ -1404,7 +1404,7 @@ XORToolDialog::run_xor ()
         if (mp_view && output_mode == OMMarkerDatabase) {
           mp_view->remove_rdb (rdb_index);
         }
-        throw tl::Exception (tl::to_string (QObject::tr ("Errors occured during processing. First error message says:\n")) + job.error_messages ().front ());
+        throw tl::Exception (tl::to_string (QObject::tr ("Errors occurred during processing. First error message says:\n")) + job.error_messages ().front ());
       }
 
       //  apply healing if required
diff --git a/src/tl/tl/tlCommandLineParser.h b/src/tl/tl/tlCommandLineParser.h
index 44c716c24..c53a5ed9b 100644
--- a/src/tl/tl/tlCommandLineParser.h
+++ b/src/tl/tl/tlCommandLineParser.h
@@ -82,7 +82,7 @@ public:
    *    "*..."                    - Multiple occurances allowed - values needs to be
    *                                an array and values are accumulated. Without *, the
    *                                value string is evaluated to a comma-separated list.
-   *                                "*" means one occurance at least unless combined with "?".
+   *                                "*" means one occurrence at least unless combined with "?".
    */
   ArgBase (const std::string &option, const std::string &brief_doc, const std::string &long_doc);
 
diff --git a/src/tl/tl/tlException.h b/src/tl/tl/tlException.h
index 6b54953e6..eab1d4416 100644
--- a/src/tl/tl/tlException.h
+++ b/src/tl/tl/tlException.h
@@ -37,7 +37,7 @@ namespace tl
  *  @brief The unspecific exception class
  *
  *  This class is the base class for all exceptions in this 
- *  framework. It does not carry further informations except 
+ *  framework. It does not carry further information except 
  *  a message string that can be created through different 
  *  constructor methods.
  */
diff --git a/src/tl/tl/tlExceptions.cc b/src/tl/tl/tlExceptions.cc
index 852dc8323..1df957ee7 100644
--- a/src/tl/tl/tlExceptions.cc
+++ b/src/tl/tl/tlExceptions.cc
@@ -96,7 +96,7 @@ void handle_exception_ui (const std::exception &ex, QWidget *parent)
 
 void handle_exception_silent ()
 {
-  tl::error << tl::to_string (tr ("An unspecific error occured"));
+  tl::error << tl::to_string (tr ("An unspecific error occurred"));
 }
 
 void handle_exception ()
diff --git a/src/tl/tl/tlHttpStreamCurl.cc b/src/tl/tl/tlHttpStreamCurl.cc
index 4d8a39349..da843ed20 100644
--- a/src/tl/tl/tlHttpStreamCurl.cc
+++ b/src/tl/tl/tlHttpStreamCurl.cc
@@ -431,7 +431,7 @@ public:
 
   /**
    *  @brief Checks the response once finished is true
-   *  This method will throw an exception if an error occured
+   *  This method will throw an exception if an error occurred
    */
   void check () const;
 
@@ -1300,7 +1300,7 @@ InputHttpStreamPrivateData::read (char *b, size_t n)
   if (m_connection->finished ()) {
     m_connection->check ();
   } else if (tl::verbosity() >= 40) {
-    tl::info << "HTTP reponse data read: " << m_connection->read_data_to_string ();
+    tl::info << "HTTP response data read: " << m_connection->read_data_to_string ();
   }
 
   return m_connection->fetch_read_data (b, n);
diff --git a/src/tl/tl/tlHttpStreamCurl.h b/src/tl/tl/tlHttpStreamCurl.h
index d0a6bbe3b..be5e840cb 100644
--- a/src/tl/tl/tlHttpStreamCurl.h
+++ b/src/tl/tl/tlHttpStreamCurl.h
@@ -114,7 +114,7 @@ public:
   /**
    *  @brief Checks for errors
    *  This method can be used after the ready event to check for errors.
-   *  It will throw an exception if errors occured.
+   *  It will throw an exception if errors occurred.
    *  read() will do the same.
    */
   void check ();
diff --git a/src/tl/tl/tlHttpStreamQt.cc b/src/tl/tl/tlHttpStreamQt.cc
index 6bff6d7b0..2d3120a24 100644
--- a/src/tl/tl/tlHttpStreamQt.cc
+++ b/src/tl/tl/tlHttpStreamQt.cc
@@ -385,7 +385,7 @@ InputHttpStreamPrivateData::read (char *b, size_t n)
   QByteArray data = mp_reply->read (n);
   memcpy (b, data.constData (), data.size ());
   if (tl::verbosity() >= 40) {
-    tl::info << "HTTP reponse data read: " << data.constData ();
+    tl::info << "HTTP response data read: " << data.constData ();
   }
   return data.size ();
 }
diff --git a/src/tl/tl/tlIntervalSet.h b/src/tl/tl/tlIntervalSet.h
index b201ee1ff..fa04a6020 100644
--- a/src/tl/tl/tlIntervalSet.h
+++ b/src/tl/tl/tlIntervalSet.h
@@ -33,7 +33,7 @@ namespace tl
 /**
  *  @brief A helper compare function for the interval map
  *
- *  This version will also finds preceeding intervals
+ *  This version will also finds preceding intervals
  */
 template <class I>
 class is_compare_f
@@ -48,7 +48,7 @@ public:
 /**
  *  @brief A helper compare function for the interval map 
  *
- *  This version will not find preceeding intervals
+ *  This version will not find preceding intervals
  */
 template <class I>
 class is_compare_f2
diff --git a/src/tl/tl/tlProgress.h b/src/tl/tl/tlProgress.h
index 0cab4587d..0245d6738 100644
--- a/src/tl/tl/tlProgress.h
+++ b/src/tl/tl/tlProgress.h
@@ -92,7 +92,7 @@ class Progress;
  *  This class also allows for some kind of background processing:
  *  once the test() method is called, the 
  *  adaptor's yield() method is called once that "yield_interval" 
- *  calls have passed. The yield_interval value should be choosen
+ *  calls have passed. The yield_interval value should be chosen
  *  sufficiently large so that no performance penalty is to be paid
  *  for this. In addition, each test() call tests whether
  *  the operation may have been cancelled and may throw an 
diff --git a/src/tl/tl/tlStream.h b/src/tl/tl/tlStream.h
index f674e3c44..d9429a35d 100644
--- a/src/tl/tl/tlStream.h
+++ b/src/tl/tl/tlStream.h
@@ -396,7 +396,7 @@ public:
   /**
    *  @brief Opens a stream from a abstract path
    *
-   *  This will automatically create the approriate delegate and 
+   *  This will automatically create the appropriate delegate and 
    *  delete it later.
    */
   InputStream (const std::string &abstract_path);
diff --git a/src/tl/tl/tlThreadedWorkers.h b/src/tl/tl/tlThreadedWorkers.h
index 44a130d14..76a24626f 100644
--- a/src/tl/tl/tlThreadedWorkers.h
+++ b/src/tl/tl/tlThreadedWorkers.h
@@ -203,7 +203,7 @@ public:
   void set_num_workers (int workers);
 
   /**
-   *  @brief Returns true if an error occured during run()
+   *  @brief Returns true if an error occurred during run()
    */
   bool has_error ();
 
@@ -394,7 +394,7 @@ private:
  *  @brief Represents one task in the task queue
  *
  *  This object must be reimplemented to provide specific
- *  informations for a task. This is the base class of all
+ *  information for a task. This is the base class of all
  *  task objects.
  */
 class TL_PUBLIC Task
diff --git a/testdata/oasis/t11.4.ot b/testdata/oasis/t11.4.ot
index 2bf767e8e..d0059d407 100644
--- a/testdata/oasis/t11.4.ot
+++ b/testdata/oasis/t11.4.ot
@@ -176,7 +176,7 @@ uint 17         ;# PLACEMENT (no mag, manhattan angles)
   bits 00111111 ;# CNXYRAAF
   int 2000      ;# placement-x
   int 0         ;# placement-y
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*310+1 ]    ;# n-displacement (g-delta: 310,320) 
diff --git a/testdata/oasis/t11.6.ot b/testdata/oasis/t11.6.ot
index f9df1a793..acae7b02a 100644
--- a/testdata/oasis/t11.6.ot
+++ b/testdata/oasis/t11.6.ot
@@ -180,7 +180,7 @@ uint 17         ;# PLACEMENT (no mag, manhattan angles)
   bits 00111111 ;# CNXYRAAF
   int 2000      ;# placement-x
   int 0         ;# placement-y
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*310+1 ]    ;# n-displacement (g-delta: 310,320) 
diff --git a/testdata/oasis/t3.1.ot b/testdata/oasis/t3.1.ot
index b1ff2cf45..0f8f11b37 100644
--- a/testdata/oasis/t3.1.ot
+++ b/testdata/oasis/t3.1.ot
@@ -224,7 +224,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 16*10 ]      ;# n-displacement (g-delta: 10-east=10,0)
@@ -234,7 +234,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
@@ -244,7 +244,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (3 times, arbitary displacement vectors)
+  uint 9        ;# repetition (3 times, arbitrary displacement vectors)
     uint 1      ;# dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
     int 12
@@ -252,7 +252,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (4 times, arbitary displacement vectors)
+  uint 9        ;# repetition (4 times, arbitrary displacement vectors)
     uint 2      ;# dimension 
     uint [ expr 16*10+10 ]   ;# n-displacement (g-delta: 10-northwest=-10,10)
 
diff --git a/testdata/oasis/t3.12.ot b/testdata/oasis/t3.12.ot
index 0ba669d48..6a613bceb 100644
--- a/testdata/oasis/t3.12.ot
+++ b/testdata/oasis/t3.12.ot
@@ -228,7 +228,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 16*10 ]      ;# n-displacement (g-delta: 10-east=10,0)
@@ -238,7 +238,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
@@ -248,7 +248,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (3 times, arbitary displacement vectors)
+  uint 9        ;# repetition (3 times, arbitrary displacement vectors)
     uint 1      ;# dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
     int 12
@@ -256,7 +256,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (4 times, arbitary displacement vectors)
+  uint 9        ;# repetition (4 times, arbitrary displacement vectors)
     uint 2      ;# dimension 
     uint [ expr 16*10+10 ]   ;# n-displacement (g-delta: 10-northwest=-10,10)
 
diff --git a/testdata/oasis/t3.2.ot b/testdata/oasis/t3.2.ot
index eed183df8..4160f20d0 100644
--- a/testdata/oasis/t3.2.ot
+++ b/testdata/oasis/t3.2.ot
@@ -237,7 +237,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 16*10 ]      ;# n-displacement (g-delta: 10-east=10,0)
@@ -247,7 +247,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
@@ -257,7 +257,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (3 times, arbitary displacement vectors)
+  uint 9        ;# repetition (3 times, arbitrary displacement vectors)
     uint 1      ;# dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
     int 12
@@ -265,7 +265,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (4 times, arbitary displacement vectors)
+  uint 9        ;# repetition (4 times, arbitrary displacement vectors)
     uint 2      ;# dimension 
     uint [ expr 16*10+10 ]   ;# n-displacement (g-delta: 10-northwest=-10,10)
 
diff --git a/testdata/oasis/t3.5.ot b/testdata/oasis/t3.5.ot
index 8209cfdd7..16d64d43a 100644
--- a/testdata/oasis/t3.5.ot
+++ b/testdata/oasis/t3.5.ot
@@ -235,7 +235,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 16*10 ]      ;# n-displacement (g-delta: 10-east=10,0)
@@ -245,7 +245,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
@@ -255,7 +255,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (3 times, arbitary displacement vectors)
+  uint 9        ;# repetition (3 times, arbitrary displacement vectors)
     uint 1      ;# dimension 
     uint [ expr 4*11+1 ]     ;# n-displacement (g-delta: 11,12) 
     int 12
@@ -263,7 +263,7 @@ record TEXT
 record TEXT
   bits 00001100 ;# 0CNXYRTL
   int -200      ;# text-y (relative)
-  uint 9        ;# repetition (4 times, arbitary displacement vectors)
+  uint 9        ;# repetition (4 times, arbitrary displacement vectors)
     uint 2      ;# dimension 
     uint [ expr 16*10+10 ]   ;# n-displacement (g-delta: 10-northwest=-10,10)
 
diff --git a/testdata/oasis/t8.1.ot b/testdata/oasis/t8.1.ot
index 89a9e2693..bc90f7ec5 100644
--- a/testdata/oasis/t8.1.ot
+++ b/testdata/oasis/t8.1.ot
@@ -143,7 +143,7 @@ uint 17         ;# PLACEMENT (no mag, manhattan angles)
   bits 00111111 ;# CNXYRAAF
   int 2000      ;# placement-x
   int 0         ;# placement-y
-  uint 8        ;# repetition (3x4 matrix, arbitary displacement vectors)
+  uint 8        ;# repetition (3x4 matrix, arbitrary displacement vectors)
     uint 1      ;# n-dimension 
     uint 2      ;# m-dimension 
     uint [ expr 4*310+1 ]    ;# n-displacement (g-delta: 310,320)