diff --git a/src/App/MappedName.h b/src/App/MappedName.h
index 84a6ca6927..8c507b4af3 100644
--- a/src/App/MappedName.h
+++ b/src/App/MappedName.h
@@ -692,7 +692,7 @@ public:
     }
 
     /// Returns true if this is shared data, or false if a unique copy has been made.
-    /// It is safe to access data only if it has been copied prior. To force a copy 
+    /// It is safe to access data only if it has been copied prior. To force a copy
     /// please \see compact()
     bool isRaw() const
     {
diff --git a/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp b/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
index 5dce428a26..5d918d7791 100644
--- a/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
+++ b/src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp
@@ -698,7 +698,7 @@ bool TaskDlgFemConstraintDisplacement::accept()
                                 name.c_str(),
                                 parameterDisplacement->get_useFlowSurfaceForce() ? "True"
                                                                                  : "False");
-        
+
         std::string scale = parameterDisplacement->getScale();// OvG: determine modified scale
         Gui::Command::doCommand(Gui::Command::Doc,
                                 "App.ActiveDocument.%s.Scale = %s",
diff --git a/src/Mod/Fem/femtaskpanels/task_constraint_flowvelocity.py b/src/Mod/Fem/femtaskpanels/task_constraint_flowvelocity.py
index 7fc28e2ad2..56ee623a2e 100644
--- a/src/Mod/Fem/femtaskpanels/task_constraint_flowvelocity.py
+++ b/src/Mod/Fem/femtaskpanels/task_constraint_flowvelocity.py
@@ -48,7 +48,7 @@ class _TaskPanel(object):
         self._paramWidget = FreeCADGui.PySideUic.loadUi(
             FreeCAD.getHomePath() + "Mod/Fem/Resources/ui/FlowVelocity.ui"
         )
-        
+
         # geometry selection widget
         # start with Solid in list!
         self._selectionWidget = selection_widgets.GeometryElementsSelection(
diff --git a/src/Mod/PartDesign/fcgear/involute.py b/src/Mod/PartDesign/fcgear/involute.py
index 99ca16b0e5..0ceb2f8385 100644
--- a/src/Mod/PartDesign/fcgear/involute.py
+++ b/src/Mod/PartDesign/fcgear/involute.py
@@ -229,7 +229,7 @@ def _create_involute_profile(
 
     # ****** calculate angles (all in radians)
     angular_pitch = 2 * pi / number_of_teeth # angle subtended by complete tooth/space pair
-    base_to_ref = genInvolutePolar(Rb, Rref) # angle between base and refernce circle
+    base_to_ref = genInvolutePolar(Rb, Rref) # angle between base and reference circle
     ref_to_stop = genInvolutePolar(Rb, Rfo) - base_to_ref # angle between ref and involute end
     if has_non_involute_flank: # involute starts at base circle
         start_to_ref = base_to_ref
@@ -261,7 +261,7 @@ def _create_involute_profile(
     tooth_thickness_half_angle = angular_pitch / 4 + enlargement_by_shift
     psi = tooth_thickness_half_angle # for the formulae below, a symbol is more readable
 
-    # rotate all points to make the tooth symetric to the X axis
+    # rotate all points to make the tooth symmetric to the X axis
     inv = [rotate(pt, -base_to_ref - psi) for pt in inv]
 
     # create the back profile of tooth (mirror image on X axis)
diff --git a/src/Mod/TechDraw/App/DimensionFormatter.cpp b/src/Mod/TechDraw/App/DimensionFormatter.cpp
index 0291f7ca33..6428bbd201 100644
--- a/src/Mod/TechDraw/App/DimensionFormatter.cpp
+++ b/src/Mod/TechDraw/App/DimensionFormatter.cpp
@@ -340,7 +340,7 @@ bool DimensionFormatter::isNumericFormat(QString formatSpecifier)
     return false;
 }
 
-//TODO: similiar code here and above
+//TODO: similar code here and above
 QStringList DimensionFormatter::getPrefixSuffixSpec(QString fSpec)
 {
     QStringList result;
diff --git a/src/Mod/TechDraw/Gui/DlgPrefsTechDrawAdvanced.ui b/src/Mod/TechDraw/Gui/DlgPrefsTechDrawAdvanced.ui
index 7efb20ffc0..762b610536 100644
--- a/src/Mod/TechDraw/Gui/DlgPrefsTechDrawAdvanced.ui
+++ b/src/Mod/TechDraw/Gui/DlgPrefsTechDrawAdvanced.ui
@@ -518,7 +518,7 @@ Each unit is approx. 0.1 mm wide</string>
         <item row="4" column="0">
          <widget class="Gui::PrefCheckBox" name="cbAutoCorrectRefs">
           <property name="toolTip">
-           <string>If checked, sytem will attempt to automatically correct dimension references when the model changes.</string>
+           <string>If checked, system will attempt to automatically correct dimension references when the model changes.</string>
           </property>
           <property name="statusTip">
            <string/>