diff --git a/src/App/ApplicationPy.cpp b/src/App/ApplicationPy.cpp
index 66bcebfad8..b82c79f77e 100644
--- a/src/App/ApplicationPy.cpp
+++ b/src/App/ApplicationPy.cpp
@@ -119,7 +119,7 @@ PyMethodDef Application::Methods[] = {
      "newDocument(name, label=None, hidden=False) -> object\n"
      "Create a new document with a given name.\n\n"
      "name: unique document name which is checked automatically.\n"
-     "label: optional user changable label for the document.\n"
+     "label: optional user changeable label for the document.\n"
      "hidden: whether to hide document 3D view."},
     {"closeDocument",  (PyCFunction) Application::sCloseDocument, METH_VARARGS,
      "closeDocument(string) -> None\n\n"
diff --git a/src/Base/FileInfo.h b/src/Base/FileInfo.h
index cbc0c82bbe..001fa21cff 100644
--- a/src/Base/FileInfo.h
+++ b/src/Base/FileInfo.h
@@ -48,7 +48,7 @@ public:
         ReadWrite = 0x03,
     };
 
-    /// Constrction
+    /// Construction
     FileInfo (const char* _FileName="");
     FileInfo (const std::string &_FileName);
     /// Set a new file name
diff --git a/src/Base/Persistence.h b/src/Base/Persistence.h
index 17837b658b..6276c8cc00 100644
--- a/src/Base/Persistence.h
+++ b/src/Base/Persistence.h
@@ -101,7 +101,7 @@ public:
      *    writer << writer.ind() << "<Mesh file=\"" << writer.addFile("MeshKernel.bms", this) << "\"/>" << std::endl;
      * }
      * \endcode
-     * The writer.isForceXML() is an indication to force you to write XML. Regardless of size and effectivness.
+     * The writer.isForceXML() is an indication to force you to write XML. Regardless of size and effectiveness.
      * The second part informs the Base::writer through writer.addFile("MeshKernel.bms", this) that this object
      * wants to write a file with the given name. The method addFile() returns a unique name that then is written
      * in the XML stream.
diff --git a/src/Base/PyExport.h b/src/Base/PyExport.h
index 15ad55e229..a9b9147dcc 100644
--- a/src/Base/PyExport.h
+++ b/src/Base/PyExport.h
@@ -168,22 +168,22 @@ public:
         return *this;
     }
 
-    /// derefrence operators
+    /// dereference operators
     HandledType &operator*() {
         return *_pHandels;
     }
 
-    /// derefrence operators
+    /// dereference operators
     HandledType *operator->() {
         return _pHandels;
     }
 
-    /// derefrence operators
+    /// dereference operators
     const HandledType &operator*() const {
         return _pHandels;
     }
 
-    /// derefrence operators
+    /// dereference operators
     const HandledType *operator->() const {
         return _pHandels;
     }
diff --git a/src/Gui/DAGView/DAGModel.h b/src/Gui/DAGView/DAGModel.h
index 6ae263b323..e39b24dcbb 100644
--- a/src/Gui/DAGView/DAGModel.h
+++ b/src/Gui/DAGView/DAGModel.h
@@ -127,7 +127,7 @@ namespace Gui
       float pointToIcon;                          //!< spacing from last column points to first icon.
       float iconToIcon;                           //!< spacing between icons.
       float iconToText;                           //!< spacing between last icon and text.
-      float rowPadding;                           //!< spaces added to rectangle bacground width ends.
+      float rowPadding;                           //!< spaces added to rectangle background width ends.
       std::vector<QBrush> backgroundBrushes;      //!< brushes to paint background rectangles.
       std::vector<QBrush> forgroundBrushes;       //!< brushes to paint points, connectors, text.
       void setupViewConstants();
diff --git a/src/Gui/DlgPreferencesImp.h b/src/Gui/DlgPreferencesImp.h
index d5c1578f8f..6594669ab6 100644
--- a/src/Gui/DlgPreferencesImp.h
+++ b/src/Gui/DlgPreferencesImp.h
@@ -53,7 +53,7 @@ class Ui_DlgPreferences;
  * \li For each widget inside your page - you want to save or load - you have to call 
  * \<objectname\>->onSave() or \<objectname\>->onRestore(). The best way to this is either to 
  * define the protected slots saveSettings() and loadSettings() in your form and overwrite
- * them in a subclass or define these slots in this subclass diretly. 
+ * them in a subclass or define these slots in this subclass directly. 
  *
  * See the example below for more details:
  *
diff --git a/src/Mod/AddonManager/Resources/icons/Manipulator_workbench_icon.svg b/src/Mod/AddonManager/Resources/icons/Manipulator_workbench_icon.svg
index 03a34de896..391dfa3f64 100644
--- a/src/Mod/AddonManager/Resources/icons/Manipulator_workbench_icon.svg
+++ b/src/Mod/AddonManager/Resources/icons/Manipulator_workbench_icon.svg
@@ -380,7 +380,7 @@
             <rdf:li>cross</rdf:li>
           </rdf:Bag>
         </dc:subject>
-        <dc:description>Four equally sized arrow heads at 90° to eachother, all joined at the tail</dc:description>
+        <dc:description>Four equally sized arrow heads at 90° to each other, all joined at the tail</dc:description>
       </cc:Work>
     </rdf:RDF>
   </metadata>
diff --git a/src/Mod/Mesh/App/Core/Iterator.h b/src/Mod/Mesh/App/Core/Iterator.h
index 6c86bf9886..b0197ad9c3 100644
--- a/src/Mod/Mesh/App/Core/Iterator.h
+++ b/src/Mod/Mesh/App/Core/Iterator.h
@@ -340,7 +340,7 @@ inline void MeshFacetIterator::Transform( const Base::Matrix4D& rclTrf )
 {
   _clTrf = rclTrf;
   Base::Matrix4D tmp;
-  // cecks for unit matrix
+  // checks for unit matrix
   _clTrf != tmp ? _bApply = true : _bApply = false;
 }
 
@@ -438,7 +438,7 @@ inline void MeshPointIterator::Transform( const Base::Matrix4D& rclTrf )
 {
   _clTrf = rclTrf;
   Base::Matrix4D tmp;
-  // cecks for unit matrix
+  // checks for unit matrix
   _clTrf != tmp ? _bApply = true : _bApply = false;
 }
 
diff --git a/src/Mod/MeshPart/App/AppMeshPartPy.cpp b/src/Mod/MeshPart/App/AppMeshPartPy.cpp
index a8977dc948..39905c4fde 100644
--- a/src/Mod/MeshPart/App/AppMeshPartPy.cpp
+++ b/src/Mod/MeshPart/App/AppMeshPartPy.cpp
@@ -134,8 +134,8 @@ public:
             "    MinLength (required, float)\n"
             "    Fineness (required, integer)\n"
             "    SecondOrder (optional, integral boolean)\n"
-            "    Optimize (optional, integeral boolean)\n"
-            "    AllowQuad (optional, integeral boolean)\n"
+            "    Optimize (optional, integral boolean)\n"
+            "    AllowQuad (optional, integral boolean)\n"
             "    GrowthRate (optional, float)\n"
             "    SegPerEdge (optional, float)\n"
             "    SegPerRadius (optional, float)\n"
diff --git a/src/Mod/Path/Tools/README.md b/src/Mod/Path/Tools/README.md
index 69f9e88a99..cdaed5a5b4 100644
--- a/src/Mod/Path/Tools/README.md
+++ b/src/Mod/Path/Tools/README.md
@@ -64,7 +64,7 @@ TechDraw's templates.
 
 ## How to create a new tool bit Shape
 
-A tool bit template represents the physical shape of a tool. It does not completely desribe the bit - for that some
+A tool bit template represents the physical shape of a tool. It does not completely describe the bit - for that some
 additional parameters are needed which will be added when an actual bit is parametrized from the template.
 
 1. Create a new FreeCAD document
diff --git a/src/Mod/Sandbox/exportDRAWEXE.py b/src/Mod/Sandbox/exportDRAWEXE.py
index d447343817..b86cce5220 100644
--- a/src/Mod/Sandbox/exportDRAWEXE.py
+++ b/src/Mod/Sandbox/exportDRAWEXE.py
@@ -161,7 +161,7 @@ def saveShape(csg,filename,shape,name,hasplacement = True,cleanshape=False):
         sh=shape.copy()
         sh.Placement=FreeCAD.Placement()
         # it not yet tested if changing the placement recreated the
-        # tessellation. but for now we simply do the cleaing once again
+        # tessellation. But for now we simply do the cleaning once again
         # to stay on the safe side
         if cleanshape:
             shape = shape.cleaned()
diff --git a/src/Tools/MakeApp.py b/src/Tools/MakeApp.py
index 11ba39e98c..fd1563b687 100644
--- a/src/Tools/MakeApp.py
+++ b/src/Tools/MakeApp.py
@@ -30,7 +30,7 @@ sys.stdout.write("Ok\n")
 # replace the _TEMPLATE_ string by <Application>
 sys.stdout.write("Modifying files...\n")
 MakeAppTools.replaceTemplate("../Mod/" + Application,"_TEMPLATE_",Application)
-# make the congigure script executable
+# make the configure script executable
 #os.chmod("../Mod/" + Application + "/configure", 0777);
 sys.stdout.write("Modifying files done.\n")
 
diff --git a/src/Tools/fcbt/CreateModule.py b/src/Tools/fcbt/CreateModule.py
index de69f2aa1b..9c95140fda 100644
--- a/src/Tools/fcbt/CreateModule.py
+++ b/src/Tools/fcbt/CreateModule.py
@@ -93,7 +93,7 @@ def createApp(Application):
 	sys.stdout.write("Modifying files...\n")
 	MakeAppTools.replaceTemplate("../Mod/" + Application,"_TEMPLATE_",Application)
 	MakeAppTools.replaceTemplate("../Mod/" + Application,"${CMAKE_SOURCE_DIR}/src/Tools/","${CMAKE_SOURCE_DIR}/src/Mod/")
-	# make the congigure script executable
+	# make the configure script executable
 	#os.chmod("../Mod/" + Application + "/configure", 0777);
 	sys.stdout.write("Modifying files done.\n")
 
diff --git a/src/Tools/fcbt/CreatePyModule.py b/src/Tools/fcbt/CreatePyModule.py
index 678b8c2a95..ab39ac6676 100644
--- a/src/Tools/fcbt/CreatePyModule.py
+++ b/src/Tools/fcbt/CreatePyModule.py
@@ -93,7 +93,7 @@ def createApp(Application):
 	sys.stdout.write("Modifying files...\n")
 	MakeAppTools.replaceTemplate("../Mod/" + Application,"_TEMPLATEPY_",Application)
 	MakeAppTools.replaceTemplate("../Mod/" + Application,"${CMAKE_SOURCE_DIR}/src/Tools/","${CMAKE_SOURCE_DIR}/src/Mod/")
-	# make the congigure script executable
+	# make the configure script executable
 	#os.chmod("../Mod/" + Application + "/configure", 0777);
 	sys.stdout.write("Modifying files done.\n")