diff --git a/src/App/PropertyFile.cpp b/src/App/PropertyFile.cpp
index cf34b69b06..916db26195 100644
--- a/src/App/PropertyFile.cpp
+++ b/src/App/PropertyFile.cpp
@@ -438,7 +438,7 @@ void PropertyFileIncluded::Restore(Base::XMLReader &reader)
     if (reader.hasAttribute("file")) {
         string file (reader.getAttribute("file") );
         if (!file.empty()) {
-            // initate a file read
+            // initiate a file read
             reader.addFile(file.c_str(),this);
             // is in the document transient path
             aboutToSetValue();
diff --git a/src/App/PropertyGeo.cpp b/src/App/PropertyGeo.cpp
index e92cc5a9aa..5f54bfc508 100644
--- a/src/App/PropertyGeo.cpp
+++ b/src/App/PropertyGeo.cpp
@@ -408,7 +408,7 @@ void PropertyVectorList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -907,7 +907,7 @@ void PropertyPlacementList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/App/PropertyStandard.cpp b/src/App/PropertyStandard.cpp
index 856dadc5fc..c995e34a23 100644
--- a/src/App/PropertyStandard.cpp
+++ b/src/App/PropertyStandard.cpp
@@ -1370,7 +1370,7 @@ void PropertyFloatList::Restore(Base::XMLReader &reader)
     string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -2608,7 +2608,7 @@ void PropertyColorList::Restore(Base::XMLReader &reader)
         std::string file (reader.getAttribute("file"));
 
         if (!file.empty()) {
-            // initate a file read
+            // initiate a file read
             reader.addFile(file.c_str(),this);
         }
     }
@@ -2887,7 +2887,7 @@ void PropertyMaterialList::Restore(Base::XMLReader &reader)
         std::string file(reader.getAttribute("file"));
 
         if (!file.empty()) {
-            // initate a file read
+            // initiate a file read
             reader.addFile(file.c_str(), this);
         }
     }
diff --git a/src/Gui/ToolBarManager.cpp b/src/Gui/ToolBarManager.cpp
index 554bd3b980..b96167114c 100644
--- a/src/Gui/ToolBarManager.cpp
+++ b/src/Gui/ToolBarManager.cpp
@@ -183,7 +183,7 @@ void ToolBarManager::setup(ToolBarItem* toolBarItems)
 
     int max_width = getMainWindow()->width();
     int top_width = 0;
-    
+
     ParameterGrp::handle hPref = App::GetApplication().GetUserParameter().GetGroup("BaseApp")
                                ->GetGroup("MainWindow")->GetGroup("Toolbars");
     QList<ToolBarItem*> items = toolBarItems->getItems();
@@ -272,8 +272,8 @@ void ToolBarManager::setup(ToolBarItem* item, QToolBar* toolbar) const
             // set the tool button user data
             if (action) action->setData(QString::fromLatin1((*it)->command().c_str()));
         } else {
-            // Note: For toolbars we do not remove and readd the actions
-            // because this causes flicker effects. So, it could happen that the order of 
+            // Note: For toolbars we do not remove and re-add the actions
+            // because this causes flicker effects. So, it could happen that the order of
             // buttons doesn't match with the order of commands in the workbench.
             int index = actions.indexOf(action);
             actions.removeAt(index);
diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index 0620818090..1e0924e400 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -245,7 +245,7 @@ public:
         }
 #endif
 
-        // Bug #0000607: Some mices also support horizontal scrolling which however might
+        // Bug #0000607: Some mice also support horizontal scrolling which however might
         // lead to some unwanted zooming when pressing the MMB for panning.
         // Thus, we filter out horizontal scrolling.
         if (event->type() == QEvent::Wheel) {
diff --git a/src/Mod/Cam/doxygen_config b/src/Mod/Cam/doxygen_config
index 3645d2455c..98c9ee8c56 100644
--- a/src/Mod/Cam/doxygen_config
+++ b/src/Mod/Cam/doxygen_config
@@ -4,7 +4,7 @@
 # Project related configuration options
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
-PROJECT_NAME           = "FreeCAD CAM Modul"
+PROJECT_NAME           = "FreeCAD CAM Module"
 PROJECT_NUMBER         = 0.1
 OUTPUT_DIRECTORY       = Doc
 CREATE_SUBDIRS         = NO
diff --git a/src/Mod/Draft/DraftGui.py b/src/Mod/Draft/DraftGui.py
index 28032dc89e..19e53fb112 100644
--- a/src/Mod/Draft/DraftGui.py
+++ b/src/Mod/Draft/DraftGui.py
@@ -1585,7 +1585,7 @@ class DraftToolBar:
 
     def checkSpecialChars(self,txt):
         '''
-        checks for special characters in the entered coords that mut be
+        checks for special characters in the entered coords that must be
         treated as shortcuts
         '''
 
diff --git a/src/Mod/Fem/App/FemMesh.cpp b/src/Mod/Fem/App/FemMesh.cpp
index dfc5a51e97..c7249fdbcf 100644
--- a/src/Mod/Fem/App/FemMesh.cpp
+++ b/src/Mod/Fem/App/FemMesh.cpp
@@ -1656,7 +1656,7 @@ void FemMesh::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
     if( reader.hasAttribute("a11")){
diff --git a/src/Mod/Fem/App/PropertyPostDataObject.cpp b/src/Mod/Fem/App/PropertyPostDataObject.cpp
index 9b72771457..5d5952720c 100644
--- a/src/Mod/Fem/App/PropertyPostDataObject.cpp
+++ b/src/Mod/Fem/App/PropertyPostDataObject.cpp
@@ -235,7 +235,7 @@ void PropertyPostDataObject::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/Mod/Inspection/App/InspectionFeature.cpp b/src/Mod/Inspection/App/InspectionFeature.cpp
index 18e789f1f3..d5c5946bf6 100644
--- a/src/Mod/Inspection/App/InspectionFeature.cpp
+++ b/src/Mod/Inspection/App/InspectionFeature.cpp
@@ -591,7 +591,7 @@ void PropertyDistanceList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/Mod/Mesh/App/Core/Degeneration.h b/src/Mod/Mesh/App/Core/Degeneration.h
index a0641d4eeb..1b742bdc8c 100644
--- a/src/Mod/Mesh/App/Core/Degeneration.h
+++ b/src/Mod/Mesh/App/Core/Degeneration.h
@@ -367,8 +367,8 @@ private:
 };
 
 /**
- * The MeshFixDeformedFacets class tries to fix deformed facets by swapping the commong edge with one of their neighbours.
- * @note Degenerated facets are also deformed facet but this algorithm tries to fix deformed facets that or not degenrated.
+ * The MeshFixDeformedFacets class tries to fix deformed facets by swapping the common edge with one of their neighbours.
+ * @note Degenerated facets are also deformed facet but this algorithm tries to fix deformed facets that or not degenerated.
  * The removal of degenerated facets is done by @ref MeshFixDegeneratedFacets.
  * @see MeshEvalDeformedFacets
  * @author Werner Mayer
diff --git a/src/Mod/Mesh/App/Core/TopoAlgorithm.h b/src/Mod/Mesh/App/Core/TopoAlgorithm.h
index 254037ff34..c6bc1712fc 100644
--- a/src/Mod/Mesh/App/Core/TopoAlgorithm.h
+++ b/src/Mod/Mesh/App/Core/TopoAlgorithm.h
@@ -77,9 +77,9 @@ public:
                                  float fMaxAngle);
     /**
      * Swaps the common edge of two adjacent facets even if the operation might
-     * be illegal. To be sure that this operation is legal check either with
+     * be illegal. To be sure that this operation is legal, check either with
      * IsSwapEdgeLegal() or ShouldSwapEdge() before.
-     * An illegel swap edge operation can produce non-manifolds, degenrated
+     * An illegel swap edge operation can produce non-manifolds, degenerated
      * facets or it might create a fold on the surface, i.e. geometric overlaps
      * of several triangles. 
      */
@@ -200,7 +200,7 @@ public:
      */
     bool SnapVertex(unsigned long ulFacetPos, const Base::Vector3f& rP);
     /**
-     * Checks whether a swap edge operation is legel that is fulfilled if the
+     * Checks whether a swap edge operation is legal, that is fulfilled if the
      * two adjacent facets builds a convex polygon. If this operation is legal
      * true is returned, false is returned if this operation is illegal or if
      * \a ulFacetPos and \a ulNeighbour are not adjacent facets.
diff --git a/src/Mod/Mesh/App/MeshProperties.cpp b/src/Mod/Mesh/App/MeshProperties.cpp
index 3af72ca4e9..5554ef1cca 100644
--- a/src/Mod/Mesh/App/MeshProperties.cpp
+++ b/src/Mod/Mesh/App/MeshProperties.cpp
@@ -146,7 +146,7 @@ void PropertyNormalList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -349,7 +349,7 @@ void PropertyCurvatureList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
     
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -606,7 +606,7 @@ void PropertyMeshKernel::Restore(Base::XMLReader &reader)
         hasSetValue();
     } 
     else {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/Mod/Part/App/PropertyTopoShape.cpp b/src/Mod/Part/App/PropertyTopoShape.cpp
index 9eb4c5445f..eb8d1f2bae 100644
--- a/src/Mod/Part/App/PropertyTopoShape.cpp
+++ b/src/Mod/Part/App/PropertyTopoShape.cpp
@@ -263,7 +263,7 @@ void PropertyPartShape::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -591,7 +591,7 @@ void PropertyFilletEdges::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/Mod/Path/App/Area.cpp b/src/Mod/Path/App/Area.cpp
index a6d6e148a0..171b2670e2 100644
--- a/src/Mod/Path/App/Area.cpp
+++ b/src/Mod/Path/App/Area.cpp
@@ -2415,8 +2415,8 @@ struct ShapeInfo{
         if(myWires.empty())
             foreachSubshape(myShape,GetWires(myWires,myRTree,myParams),TopAbs_WIRE);
 
-        // Now find the ture nearest point among the wires returned. Currently
-        // only closed wire has a ture nearest point, using OCC's
+        // Now find the true nearest point among the wires returned. Currently
+        // only closed wire has a true nearest point, using OCC's
         // BRepExtrema_DistShapeShape. We don't do this on open wires, because
         // we haven't implemented wire breaking on open wire yet, and I doubt
         // its usefulness.
diff --git a/src/Mod/Path/App/Path.cpp b/src/Mod/Path/App/Path.cpp
index 58a1f4c574..25665f430a 100644
--- a/src/Mod/Path/App/Path.cpp
+++ b/src/Mod/Path/App/Path.cpp
@@ -338,7 +338,7 @@ void Toolpath::Restore(XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/Mod/Path/App/PropertyPath.cpp b/src/Mod/Path/App/PropertyPath.cpp
index f0360b07cf..05b5ce8536 100644
--- a/src/Mod/Path/App/PropertyPath.cpp
+++ b/src/Mod/Path/App/PropertyPath.cpp
@@ -114,7 +114,7 @@ void PropertyPath::Restore(Base::XMLReader &reader)
 
     std::string file (reader.getAttribute("file") );
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 
diff --git a/src/Mod/Points/App/Points.cpp b/src/Mod/Points/App/Points.cpp
index 111d864df8..04ca6471ab 100644
--- a/src/Mod/Points/App/Points.cpp
+++ b/src/Mod/Points/App/Points.cpp
@@ -176,7 +176,7 @@ void PointKernel::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
     if (reader.DocumentSchema > 3) {
diff --git a/src/Mod/Points/App/Properties.cpp b/src/Mod/Points/App/Properties.cpp
index 0d99158a32..a56464facf 100644
--- a/src/Mod/Points/App/Properties.cpp
+++ b/src/Mod/Points/App/Properties.cpp
@@ -144,7 +144,7 @@ void PropertyGreyValueList::Restore(Base::XMLReader &reader)
     string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -318,7 +318,7 @@ void PropertyNormalList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
@@ -578,7 +578,7 @@ void PropertyCurvatureList::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
 }
diff --git a/src/Mod/Points/App/PropertyPointKernel.cpp b/src/Mod/Points/App/PropertyPointKernel.cpp
index 6a1d659b6f..1feee5f860 100644
--- a/src/Mod/Points/App/PropertyPointKernel.cpp
+++ b/src/Mod/Points/App/PropertyPointKernel.cpp
@@ -104,7 +104,7 @@ void PropertyPointKernel::Restore(Base::XMLReader &reader)
     std::string file (reader.getAttribute("file") );
 
     if (!file.empty()) {
-        // initate a file read
+        // initiate a file read
         reader.addFile(file.c_str(),this);
     }
     if(reader.DocumentSchema > 3)
diff --git a/src/Mod/Robot/App/kdl_cp/path_line.hpp b/src/Mod/Robot/App/kdl_cp/path_line.hpp
index 548aaf4aa1..7f27ba9062 100644
--- a/src/Mod/Robot/App/kdl_cp/path_line.hpp
+++ b/src/Mod/Robot/App/kdl_cp/path_line.hpp
@@ -98,7 +98,7 @@ class Path_Line : public Path
          * of the frame in which you express your path.
          * Other implementations for RotationalInterpolations COULD be
          *    (not implemented) (yet) :
-         *    1) quaternion interpolation : but this is more difficult for the human to interprete
+         *    1) quaternion interpolation : but this is more difficult for the human to interpret
          *    2) 3-axis interpolation : express the orientation of the frame in e.g.
          *       euler zyx angles alfa,beta, gamma  and interpolate these parameters.
          *       But this is dependent of the frame you choose as a reference and
diff --git a/src/Mod/Robot/App/kdl_cp/utilities/error_stack.cxx b/src/Mod/Robot/App/kdl_cp/utilities/error_stack.cxx
index 939421042a..547e7005b9 100644
--- a/src/Mod/Robot/App/kdl_cp/utilities/error_stack.cxx
+++ b/src/Mod/Robot/App/kdl_cp/utilities/error_stack.cxx
@@ -23,7 +23,7 @@
 namespace KDL {
 
 // Trace of the call stack of the I/O routines to help user
-// interprete error messages from I/O
+// interpret error messages from I/O
 typedef std::stack<std::string>  ErrorStack;
 
 // should be in Thread Local Storage if this gets multithreaded one day...
diff --git a/src/Mod/Show/TempoVis.py b/src/Mod/Show/TempoVis.py
index c2e74b2b79..999f8fdc5d 100644
--- a/src/Mod/Show/TempoVis.py
+++ b/src/Mod/Show/TempoVis.py
@@ -319,7 +319,7 @@ class TempoVis(FrozenClass):
     def _enableClipPlane(self, obj, enable, placement = None, offset = 0.0):
         """Enables or disables clipping for an object. Placement specifies the plane (plane 
         is placement's XY plane), and should be in global CS. 
-        Offest shifts the plane; positive offset reveals more material, negative offset 
+        Offset shifts the plane; positive offset reveals more material, negative offset 
         hides more material."""
         if not hasattr(obj, 'getGlobalPlacement'):
             print("    {obj} has no attribute 'getGlobalPlacement'".format(obj= obj.Name))
diff --git a/src/Tools/fcbt/DistBin.py b/src/Tools/fcbt/DistBin.py
index df1e64091e..be6c84eb5e 100644
--- a/src/Tools/fcbt/DistBin.py
+++ b/src/Tools/fcbt/DistBin.py
@@ -41,7 +41,7 @@ FileTools.cpallWithFilter('../../lib',DistDir+DistBin+'/lib',FileTools.SetUpFilt
 
 #====================================================================
 # copy Modules
-sys.stdout.write( 'Copy modul Tree ...\n')
+sys.stdout.write( 'Copy module Tree ...\n')
 DistTools.EnsureDir(DistDir+DistBin+'/Mod')
 FileTools.cpallWithFilter('../../src/Mod',DistDir+DistBin+'/Mod',FileTools.SetUpFilter(DistTools.ModFilter))