diff --git a/src/Application.cpp b/src/Application.cpp
index 3e6442d34..34a2b2d78 100644
--- a/src/Application.cpp
+++ b/src/Application.cpp
@@ -253,7 +253,7 @@ void Application::startBackgroundMode(MainWindow* window)
         KAction* action = new KAction(window);
         KShortcut shortcut = action->shortcut();
         action->setObjectName("Konsole Background Mode");
-        //TODO - Customisable key sequence for this
+        //TODO - Customizable key sequence for this
         action->setGlobalShortcut( KShortcut(QKeySequence(Qt::Key_F12)) );
 
         _backgroundInstance = window;
diff --git a/src/BlockArray.h b/src/BlockArray.h
index c529cbb8f..196d96a04 100644
--- a/src/BlockArray.h
+++ b/src/BlockArray.h
@@ -56,7 +56,7 @@ public:
     * adds the Block at the end of history.
     * This may drop other blocks.
     *
-    * The ownership on the block is transfered.
+    * The ownership on the block is transferred.
     * An unique index number is returned for accessing
     * it later (if not yet dropped then)
     *
diff --git a/src/Screen.h b/src/Screen.h
index 49ab0741b..9f5e6b2a3 100644
--- a/src/Screen.h
+++ b/src/Screen.h
@@ -449,7 +449,7 @@ public:
     /**
      * Copies part of the output to a stream.
      *
-     * @param decoder A decoder which coverts terminal characters into text
+     * @param decoder A decoder which converts terminal characters into text
      * @param fromLine The first line in the history to retrieve
      * @param toLine The last line in the history to retrieve
      */
@@ -460,7 +460,7 @@ public:
      * into a stream.
      *
      * @param decoder A decoder which converts terminal characters into text.  
-     * PlainTextDecoder is the most commonly used decoder which coverts characters 
+     * PlainTextDecoder is the most commonly used decoder which converts characters 
      * into plain text with no formatting.
      * @param preserveLineBreaks Specifies whether new line characters should 
      * be inserted into the returned text at the end of each terminal line. 
@@ -556,7 +556,7 @@ private:
     //         history->getLines() + lines - 1
     //start - the first column on the line to copy
     //count - the number of characters on the line to copy
-    //decoder - a decoder which coverts terminal characters (an Character array) into text
+    //decoder - a decoder which converts terminal characters (an Character array) into text
     //appendNewLine - if true a new line character (\n) is appended to the end of the line
     int  copyLineToStream(int line, 
                           int start, 
diff --git a/src/ScreenWindow.h b/src/ScreenWindow.h
index adf05471e..51adb4242 100644
--- a/src/ScreenWindow.h
+++ b/src/ScreenWindow.h
@@ -94,7 +94,7 @@ public:
      * whole window, but will be a smaller area in, for example, applications
      * which provide split-screen facilities.
      *
-     * This is not guaranteed to be accurate, but allows views to optimise
+     * This is not guaranteed to be accurate, but allows views to optimize
      * rendering by reducing the amount of costly text rendering that
      * needs to be done when the output is scrolled. 
      */
@@ -110,7 +110,7 @@ public:
      * usually the whole window area.
      *
      * Like scrollCount(), this is not guaranteed to be accurate,
-     * but allows views to optimise rendering.
+     * but allows views to optimize rendering.
      */
     QRect scrollRegion() const;
 
diff --git a/src/TerminalDisplay.cpp b/src/TerminalDisplay.cpp
index 1f660e819..72ec5d5fb 100644
--- a/src/TerminalDisplay.cpp
+++ b/src/TerminalDisplay.cpp
@@ -1508,7 +1508,7 @@ void TerminalDisplay::blinkEvent()
 
   _blinking = !_blinking;
 
-  //TODO:  Optimise to only repaint the areas of the widget 
+  //TODO:  Optimize to only repaint the areas of the widget 
   // where there is blinking text
   // rather than repainting the whole widget.
   update();
diff --git a/src/Vt102Emulation.cpp b/src/Vt102Emulation.cpp
index 849a9ae62..8d3fd1f0a 100644
--- a/src/Vt102Emulation.cpp
+++ b/src/Vt102Emulation.cpp
@@ -534,7 +534,7 @@ void Vt102Emulation::processToken(int token, int p, int q)
     case TY_ESC_DE('8'      ) : _currentScreen->helpAlign            (          ); break;
 
 // resize = \e[8;<row>;<col>t
-    case TY_CSI_PS('t',   8) : setImageSize( q /* colums */, p /* lines */ );    break;
+    case TY_CSI_PS('t',   8) : setImageSize( q /* columns */, p /* lines */ );    break;
 
 // change tab text color : \e[28;<color>t  color: 0-16,777,215
     case TY_CSI_PS('t',   28) : emit changeTabTextColorRequest      ( p        );          break;