diff --git a/src/Gui/ViewProviderOriginGroupExtension.cpp b/src/Gui/ViewProviderOriginGroupExtension.cpp
index 4735ccc363..02577a0253 100644
--- a/src/Gui/ViewProviderOriginGroupExtension.cpp
+++ b/src/Gui/ViewProviderOriginGroupExtension.cpp
@@ -115,19 +115,19 @@ void ViewProviderOriginGroupExtension::extensionUpdateData( const App::Property*
 
 void ViewProviderOriginGroupExtension::slotChangedObjectApp ( const App::DocumentObject& obj) {
     auto* group = getExtendedViewProvider()->getObject()->getExtensionByType<App::OriginGroupExtension>();
-    if ( group && group->hasObject (&obj, /*recusive=*/ true ) ) {
+    if ( group && group->hasObject (&obj, /*recursive=*/ true ) ) {
         updateOriginSize ();
     }
 }
 
 void ViewProviderOriginGroupExtension::slotChangedObjectGui ( const Gui::ViewProviderDocumentObject& vp) {
     if ( !vp.isDerivedFrom ( Gui::ViewProviderOriginFeature::getClassTypeId () )) {
-        // Ignore origins to avoid infinite recursion (not likely in a well-formed focument, 
+        // Ignore origins to avoid infinite recursion (not likely in a well-formed document, 
         //          but may happen in documents designed in old versions of assembly branch )
         auto* group = getExtendedViewProvider()->getObject()->getExtensionByType<App::OriginGroupExtension>();
         App::DocumentObject *obj = vp.getObject ();
 
-        if ( group && obj && group->hasObject (obj, /*recusive=*/ true ) ) {
+        if ( group && obj && group->hasObject (obj, /*recursive=*/ true ) ) {
             updateOriginSize ();
         }
     }
diff --git a/src/Mod/Mesh/App/Core/Simplify.h b/src/Mod/Mesh/App/Core/Simplify.h
index 8843944b87..d2b819fc43 100644
--- a/src/Mod/Mesh/App/Core/Simplify.h
+++ b/src/Mod/Mesh/App/Core/Simplify.h
@@ -17,15 +17,15 @@
 
 typedef Base::Vector3f vec3f;
 
-class SymetricMatrix { 
+class SymmetricMatrix { 
 
 public:
 
     // Constructor
 
-    SymetricMatrix(double c=0) { for (std::size_t i=0;i<10;++i ) m[i] = c; }
+    SymmetricMatrix(double c=0) { for (std::size_t i=0;i<10;++i ) m[i] = c; }
 
-    SymetricMatrix(double m11, double m12, double m13, double m14, 
+    SymmetricMatrix(double m11, double m12, double m13, double m14, 
                                double m22, double m23, double m24,
                                            double m33, double m34,
                                                        double m44) {
@@ -37,7 +37,7 @@ public:
 
     // Make plane
 
-    SymetricMatrix(double a,double b,double c,double d)
+    SymmetricMatrix(double a,double b,double c,double d)
     {
         m[0] = a*a;  m[1] = a*b;  m[2] = a*c;  m[3] = a*d; 
                      m[4] = b*b;  m[5] = b*c;  m[6] = b*d; 
@@ -58,15 +58,15 @@ public:
         return det;
     }
 
-    const SymetricMatrix operator+(const SymetricMatrix& n) const
+    const SymmetricMatrix operator+(const SymmetricMatrix& n) const
     { 
-        return SymetricMatrix( m[0]+n[0],   m[1]+n[1],   m[2]+n[2],   m[3]+n[3], 
-                                            m[4]+n[4],   m[5]+n[5],   m[6]+n[6], 
+        return SymmetricMatrix( m[0]+n[0],    m[1]+n[1],   m[2]+n[2],   m[3]+n[3]
+                                              m[4]+n[4],   m[5]+n[5],   m[6]+n[6],
                                                          m[ 7]+n[ 7], m[ 8]+n[8 ],
                                                                       m[ 9]+n[9 ]);
     }
 
-    SymetricMatrix& operator+=(const SymetricMatrix& n)
+    SymmetricMatrix& operator+=(const SymmetricMatrix& n)
     {
         m[0]+=n[0];   m[1]+=n[1];   m[2]+=n[2];   m[3]+=n[3]; 
         m[4]+=n[4];   m[5]+=n[5];   m[6]+=n[6];   m[7]+=n[7]; 
@@ -82,7 +82,7 @@ class Simplify
 {
 public:
     struct Triangle { int v[3];double err[4];int deleted,dirty;vec3f n; };
-    struct Vertex { vec3f p;int tstart,tcount;SymetricMatrix q;int border;};
+    struct Vertex { vec3f p;int tstart,tcount;SymmetricMatrix q;int border;};
     struct Ref { int tid,tvertex; }; 
     std::vector<Triangle> triangles;
     std::vector<Vertex> vertices;
@@ -93,7 +93,7 @@ public:
 private:
     // Helper functions
 
-    double vertex_error(SymetricMatrix q, double x, double y, double z);
+    double vertex_error(SymmetricMatrix q, double x, double y, double z);
     double calculate_error(int id_v1, int id_v2, vec3f &p_result);
     bool flipped(vec3f p,int i0,int i1,Vertex &v0,Vertex &v1,std::vector<int> &deleted);
     void update_triangles(int i0,Vertex &v,std::vector<int> &deleted,int &deleted_triangles);
@@ -324,7 +324,7 @@ void Simplify::update_mesh(int iteration)
     if (iteration == 0)
     {
         for (std::size_t i=0;i<vertices.size();++i)
-            vertices[i].q=SymetricMatrix(0.0);
+            vertices[i].q=SymmetricMatrix(0.0);
 
         for (std::size_t i=0;i<triangles.size();++i)
         {
@@ -336,7 +336,7 @@ void Simplify::update_mesh(int iteration)
             n.Normalize();
             t.n=n;
             for (std::size_t j=0;j<3;++j)
-                vertices[t.v[j]].q = vertices[t.v[j]].q+SymetricMatrix(n.x,n.y,n.z,-n.Dot(p[0]));
+                vertices[t.v[j]].q = vertices[t.v[j]].q+SymmetricMatrix(n.x,n.y,n.z,-n.Dot(p[0]));
         }
         for (std::size_t i=0;i<triangles.size();++i)
         {
@@ -470,7 +470,7 @@ void Simplify::compact_mesh()
 
 // Error between vertex and Quadric
 
-double Simplify::vertex_error(SymetricMatrix q, double x, double y, double z)
+double Simplify::vertex_error(SymmetricMatrix q, double x, double y, double z)
 {
     return   q[0]*x*x + 2*q[1]*x*y + 2*q[2]*x*z + 2*q[3]*x + q[4]*y*y
          + 2*q[5]*y*z + 2*q[6]*y + q[7]*z*z + 2*q[8]*z + q[9];
@@ -482,7 +482,7 @@ double Simplify::calculate_error(int id_v1, int id_v2, vec3f &p_result)
 {
     // compute interpolated vertex 
 
-    SymetricMatrix q = vertices[id_v1].q + vertices[id_v2].q;
+    SymmetricMatrix q = vertices[id_v1].q + vertices[id_v2].q;
     bool   border = vertices[id_v1].border & vertices[id_v2].border;
     double error=0;
     double det = q.det(0, 1, 2, 1, 4, 5, 2, 5, 7);
diff --git a/src/Mod/Raytracing/App/resources/FCAnimation.pov b/src/Mod/Raytracing/App/resources/FCAnimation.pov
index 26621c2ff5..0aeaf020aa 100644
--- a/src/Mod/Raytracing/App/resources/FCAnimation.pov
+++ b/src/Mod/Raytracing/App/resources/FCAnimation.pov
@@ -49,22 +49,22 @@
 
 // Colormap for Coordinate grid
 #declare scalemap = color_map {
-        [0.000          color GridCol1] // Begin of red bar for main unit
-        [lWidth        color GridCol1] // End of red bar
-        [(0.001+lWidth) color GridTran] // Beginn of first gap
+        [0.000          color GridCol1] // Beginning of red bar for main unit
+        [lWidth         color GridCol1] // End of red bar
+        [(0.001+lWidth) color GridTran] // Beginning of first gap
         [0.249          color GridTran] // End of first gap
-        [0.250          color GridCol2] // Begin of yellow bar for sub unit
+        [0.250          color GridCol2] // Beginning of yellow bar for sub unit
         [(0.250+lWidth) color GridCol2] // End of yellow bar
-        [(0.251+lWidth) color GridTran] // Beginn of second gap
+        [(0.251+lWidth) color GridTran] // Beginning of second gap
         [0.499          color GridTran] // End of first gap
-        [0.500          color GridCol2] // Begin of yellow bar for sub unit
-        [(0.500+lWidth)  color GridCol2] // End of yellow bar
-        [(0.501+lWidth) color GridTran] // Beginn of second gap
+        [0.500          color GridCol2] // Beginning of yellow bar for sub unit
+        [(0.500+lWidth) color GridCol2] // End of yellow bar
+        [(0.501+lWidth) color GridTran] // Beginning of second gap
         [0.749          color GridTran] // End of first gap
-        [0.750          color GridCol2] // Begin of yellow bar for sub unit
+        [0.750          color GridCol2] // Beginning of yellow bar for sub unit
         [(0.750+lWidth) color GridCol2] // End of yellow bar
-        [(0.751+lWidth) color GridTran] // Beginn of second gap
-        [1.0          color GridTran] // End of second gap
+        [(0.751+lWidth) color GridTran] // Beginning of second gap
+        [1.0            color GridTran] // End of second gap
       };
 
 // finish for objects
diff --git a/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp b/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
index 3c0b678445..286aaf8f49 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
+++ b/src/Mod/Sketcher/Gui/TaskSketcherElements.cpp
@@ -144,7 +144,7 @@ void ElementView::contextMenuEvent (QContextMenuEvent* event)
     CONTEXT_ITEM("Constraint_Perpendicular","Perpendicular Constraint","Sketcher_ConstrainPerpendicular",doPerpendicularConstraint,true)
     CONTEXT_ITEM("Constraint_Tangent","Tangent Constraint","Sketcher_ConstrainTangent",doTangentConstraint,true)
     CONTEXT_ITEM("Constraint_EqualLength","Equal Length","Sketcher_ConstrainEqual",doEqualConstraint,true)
-    CONTEXT_ITEM("Constraint_Symmetric","Symmetric","Sketcher_ConstrainSymmetric",doSymetricConstraint,true)
+    CONTEXT_ITEM("Constraint_Symmetric","Symmetric","Sketcher_ConstrainSymmetric",doSymmetricConstraint,true)
     CONTEXT_ITEM("Sketcher_ConstrainLock","Lock Constraint","Sketcher_ConstrainLock",doLockConstraint,true)    
     CONTEXT_ITEM("Constraint_HorizontalDistance","Horizontal Distance","Sketcher_ConstrainDistanceX",doHorizontalDistance,true)
     CONTEXT_ITEM("Constraint_VerticalDistance","Vertical Distance","Sketcher_ConstrainDistanceY",doVerticalDistance,true)
@@ -189,7 +189,7 @@ CONTEXT_MEMBER_DEF("Sketcher_ConstrainRadius",doRadiusConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainAngle",doAngleConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainEqual",doEqualConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainPointOnObject",doPointOnObjectConstraint)
-CONTEXT_MEMBER_DEF("Sketcher_ConstrainSymmetric",doSymetricConstraint)
+CONTEXT_MEMBER_DEF("Sketcher_ConstrainSymmetric",doSymmetricConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_ConstrainTangent",doTangentConstraint)
 CONTEXT_MEMBER_DEF("Sketcher_CloseShape",doCloseShape)
 CONTEXT_MEMBER_DEF("Sketcher_ConnectLines",doConnect)
diff --git a/src/Mod/Sketcher/Gui/TaskSketcherElements.h b/src/Mod/Sketcher/Gui/TaskSketcherElements.h
index 0bd94f741f..7ba50da833 100644
--- a/src/Mod/Sketcher/Gui/TaskSketcherElements.h
+++ b/src/Mod/Sketcher/Gui/TaskSketcherElements.h
@@ -71,7 +71,7 @@ protected Q_SLOTS:
     void doAngleConstraint();
     void doEqualConstraint();
     void doPointOnObjectConstraint();
-    void doSymetricConstraint();
+    void doSymmetricConstraint();
     void doTangentConstraint();
     // Other Commands
     void doToggleConstruction();