diff --git a/analyzers/cppcheck/parameters.cpp b/analyzers/cppcheck/parameters.cpp
--- a/analyzers/cppcheck/parameters.cpp
+++ b/analyzers/cppcheck/parameters.cpp
@@ -124,7 +124,7 @@
 
     const QString mocMessage = i18n(
         "It seems that this project uses Qt library. For correctly work of cppcheck "
-        "the value for define Q_MOC_OUTPUT_REVISION must be set. Unfortunatly, the plugin is unable "
+        "the value for define Q_MOC_OUTPUT_REVISION must be set. Unfortunately, the plugin is unable "
         "to find this value automatically - you should set it manually by adding "
         "'-DQ_MOC_OUTPUT_REVISION=XX' to extra parameters. The 'XX' value can be found in any project's "
         "moc-generated file or in the <QtCore/qobjectdefs.h> header file.");
diff --git a/debuggers/common/midebugsession.cpp b/debuggers/common/midebugsession.cpp
--- a/debuggers/common/midebugsession.cpp
+++ b/debuggers/common/midebugsession.cpp
@@ -1177,7 +1177,7 @@
     if (m_tty){
         m_tty->readRemaining();
         // Tty is no longer usable, delete it. Without this, QSocketNotifier
-        // will continiously bomd STTY with signals, so we need to either disable
+        // will continuously bomd STTY with signals, so we need to either disable
         // QSocketNotifier, or delete STTY. The latter is simpler, since we can't
         // reuse it for future debug sessions anyway.
         m_tty.reset(nullptr);
@@ -1249,7 +1249,7 @@
     if (m_tty){
         m_tty->readRemaining();
         // Tty is no longer usable, delete it. Without this, QSocketNotifier
-        // will continiously bomd STTY with signals, so we need to either disable
+        // will continuously bomd STTY with signals, so we need to either disable
         // QSocketNotifier, or delete STTY. The latter is simpler, since we can't
         // reuse it for future debug sessions anyway.
         m_tty.reset(nullptr);
diff --git a/debuggers/common/mivariable.h b/debuggers/common/mivariable.h
--- a/debuggers/common/mivariable.h
+++ b/debuggers/common/mivariable.h
@@ -43,7 +43,7 @@
 
     ~MIVariable();
 
-    /* FIXME: should eventually remove, so that existance of
+    /* FIXME: should eventually remove, so that existence of
         varobjs is fully encapsulalated inside GdbVariable.  */
     const QString& varobj() const;
     void handleUpdate(const MI::Value& var);
diff --git a/debuggers/common/widgets/debuggerconsoleview.h b/debuggers/common/widgets/debuggerconsoleview.h
--- a/debuggers/common/widgets/debuggerconsoleview.h
+++ b/debuggers/common/widgets/debuggerconsoleview.h
@@ -56,7 +56,7 @@
     ~DebuggerConsoleView();
 
     /**
-     * Whether show a button allowing user to interrput debugger execution.
+     * Whether show a button allowing user to interrupt debugger execution.
      */
     void setShowInterrupt(bool enable);
 
diff --git a/debuggers/gdb/TODO.txt b/debuggers/gdb/TODO.txt
--- a/debuggers/gdb/TODO.txt
+++ b/debuggers/gdb/TODO.txt
@@ -43,7 +43,7 @@
 
       - Debugging optimized binaries
 
-      - Debugged application somtimes not killed.
+      - Debugged application sometimes not killed.
 
       - Fix moving breakpoints on editing files
 
diff --git a/debuggers/lldb/controllers/framestackmodel.cpp b/debuggers/lldb/controllers/framestackmodel.cpp
--- a/debuggers/lldb/controllers/framestackmodel.cpp
+++ b/debuggers/lldb/controllers/framestackmodel.cpp
@@ -69,7 +69,7 @@
     // TODO: preliminary test shows there might be a bug in lldb-mi
     // that's causing std::logic_error when executing -thread-info with
     // more than one threads. Find a workaround for this (and report bug
-    // if it truely is).
+    // if it truly is).
     session()->addCommand(ThreadInfo, "", this, &LldbFrameStackModel::handleThreadInfo);
 }
 
diff --git a/debuggers/lldb/lldbcommand.cpp b/debuggers/lldb/lldbcommand.cpp
--- a/debuggers/lldb/lldbcommand.cpp
+++ b/debuggers/lldb/lldbcommand.cpp
@@ -179,7 +179,7 @@
             }
             break;
         }
-        // find the postion to insert '-f'
+        // find the position to insert '-f'
         case BreakInsert: {
             if (!overrideCmd.isEmpty()) {
                 // already done
diff --git a/formatters/astyle/lib/ASBeautifier.cpp b/formatters/astyle/lib/ASBeautifier.cpp
--- a/formatters/astyle/lib/ASBeautifier.cpp
+++ b/formatters/astyle/lib/ASBeautifier.cpp
@@ -1268,7 +1268,7 @@
 	assert(isCharPotentialOperator(line[i]));
 	// find the operator in the vector
 	// the vector contains the LONGEST operators first
-	// must loop thru the entire vector
+	// must loop through the entire vector
 	size_t maxOperators = possibleOperators->size();
 	for (size_t p = 0; p < maxOperators; p++)
 	{
diff --git a/formatters/astyle/lib/ASFormatter.cpp b/formatters/astyle/lib/ASFormatter.cpp
--- a/formatters/astyle/lib/ASFormatter.cpp
+++ b/formatters/astyle/lib/ASFormatter.cpp
@@ -582,7 +582,7 @@
 				isInHorstmannRunIn = false;
 			}
 			processPreprocessor();
-			//  need to fall thru here to reset the variables
+			//  need to fall through here to reset the variables
 		}
 
 		/* not in preprocessor ... */
@@ -1102,7 +1102,7 @@
 			else if ((newHeader = findHeader(preCommandHeaders)) != NULL)
 			{
 				foundPreCommandHeader = true;
-				// fall thru here for a 'const' that is not a precommand header
+				// fall through here for a 'const' that is not a precommand header
 			}
 			else if ((newHeader = findHeader(castOperators)) != NULL)
 			{
diff --git a/formatters/astyle/tests/test_astyle.cpp b/formatters/astyle/tests/test_astyle.cpp
--- a/formatters/astyle/tests/test_astyle.cpp
+++ b/formatters/astyle/tests/test_astyle.cpp
@@ -160,7 +160,7 @@
 {
     // think this:
     // asdf = 1;
-    // and you execute the assitant to get:
+    // and you execute the assistant to get:
     // int asdf = 1;
 
     // test1: already indented
diff --git a/languages/clang/tests/test_buddies.cpp b/languages/clang/tests/test_buddies.cpp
--- a/languages/clang/tests/test_buddies.cpp
+++ b/languages/clang/tests/test_buddies.cpp
@@ -405,7 +405,7 @@
     // check that it only contains pNewView
     QVERIFY(pContainer->count() == 1 && pContainer->hasWidget(pNewView->widget()));
 
-    // now open the correponding definition file, classA.cpp
+    // now open the corresponding definition file, classA.cpp
     IDocument *pClassAImplem = m_documentController->openDocument(QUrl::fromLocalFile(dirA.filePath("classA.cpp")));
     QVERIFY(pClassAImplem);
     pMainWindow->activeView()->setObjectName("classA.cpp");
diff --git a/languages/clang/tests/test_duchain.cpp b/languages/clang/tests/test_duchain.cpp
--- a/languages/clang/tests/test_duchain.cpp
+++ b/languages/clang/tests/test_duchain.cpp
@@ -227,7 +227,7 @@
 void TestDUChain::testInclude()
 {
     TestFile header("int foo() { return 42; }\n", "h");
-    // NOTE: header is _not_ explictly being parsed, instead the impl job does that
+    // NOTE: header is _not_ explicitly being parsed, instead the impl job does that
 
     TestFile impl("#include \"" + header.url().byteArray() + "\"\n"
                   "int main() { return foo(); }", "cpp", &header);
diff --git a/languages/clang/util/clangutils.h b/languages/clang/util/clangutils.h
--- a/languages/clang/util/clangutils.h
+++ b/languages/clang/util/clangutils.h
@@ -59,7 +59,7 @@
     /**
      * Given a cursor representing a function, returns a vector containing the string
      * representations of the default arguments of the function which are defined at
-     * the occurence of the cursor. Note that this is not necessarily all of the default
+     * the occurrence of the cursor. Note that this is not necessarily all of the default
      * arguments of the function.
      *
      * @param cursor The cursor to examine
diff --git a/languages/qmljs/duchain/declarationbuilder.cpp b/languages/qmljs/duchain/declarationbuilder.cpp
--- a/languages/qmljs/duchain/declarationbuilder.cpp
+++ b/languages/qmljs/duchain/declarationbuilder.cpp
@@ -139,7 +139,7 @@
     }
     openType(func);
 
-    // Parameters, if any (a function must always have an interal function context,
+    // Parameters, if any (a function must always have an internal function context,
     // so always open a context here even if there are no parameters)
     DUContext* parametersContext = openContext(
         node + 1,                                               // Don't call setContextOnNode on node, only the body context can be associated with node
diff --git a/languages/qmljs/libs/qmljs/qmljsimportdependencies.h b/languages/qmljs/libs/qmljs/qmljsimportdependencies.h
--- a/languages/qmljs/libs/qmljs/qmljsimportdependencies.h
+++ b/languages/qmljs/libs/qmljs/qmljsimportdependencies.h
@@ -56,7 +56,7 @@
 namespace Internal { class ImportDependenciesPrivate; }
 class ImportDependencies;
 
-// match strenght wrt to the selectors of a ViewerContext
+// match strength wrt to the selectors of a ViewerContext
 // this is valid only within a ViewerContext
 class QMLJS_EXPORT ImportMatchStrength
 {
diff --git a/projectbuilders/cmakebuilder/cmakebuilder.cpp b/projectbuilders/cmakebuilder/cmakebuilder.cpp
--- a/projectbuilders/cmakebuilder/cmakebuilder.cpp
+++ b/projectbuilders/cmakebuilder/cmakebuilder.cpp
@@ -272,7 +272,7 @@
         generatorNames << "Ninja";
 
 #ifdef Q_OS_WIN
-    // Visual Studio solution is the standard generator under windows, but we dont want to use
+    // Visual Studio solution is the standard generator under windows, but we don't want to use
     // the VS IDE, so we need nmake makefiles
     generatorNames << "NMake Makefiles";
 #endif
diff --git a/projectbuilders/qmakebuilder/qmakebuilderpreferences.cpp b/projectbuilders/qmakebuilder/qmakebuilderpreferences.cpp
--- a/projectbuilders/qmakebuilder/qmakebuilderpreferences.cpp
+++ b/projectbuilders/qmakebuilder/qmakebuilderpreferences.cpp
@@ -123,7 +123,7 @@
     } else {
         // invalid data: message box
         KMessageBox::error(nullptr, errormsg, "Data is invalid!");
-        // FIXME dialog behaves like if save really happend (dialog closes if user click ok) even if changed signal is
+        // FIXME dialog behaves like if save really happened (dialog closes if user click ok) even if changed signal is
         // emitted
     }
 }
diff --git a/projectmanagers/cmake/settings/cmakepreferences.cpp b/projectmanagers/cmake/settings/cmakepreferences.cpp
--- a/projectmanagers/cmake/settings/cmakepreferences.cpp
+++ b/projectmanagers/cmake/settings/cmakepreferences.cpp
@@ -295,7 +295,7 @@
     // NOTE: (on removing the trailing slashes)
     // Generally, we have no clue about how shall a trailing slash look in the current system.
     // Moreover, the slash may be a part of the filename.
-    // It may be '/' or '\', so maybe should we rely on CMake::allBuildDirs() for returning well-formed pathes?
+    // It may be '/' or '\', so maybe should we rely on CMake::allBuildDirs() for returning well-formed paths?
     QStringList used = CMake::allBuildDirs( m_project );
     bdCreator.setAlreadyUsed(used);
     bdCreator.setCMakeBinary(Path(CMake::findExecutable()));
diff --git a/projectmanagers/cmake/tests/cmakeprojectvisitortest.cpp b/projectmanagers/cmake/tests/cmakeprojectvisitortest.cpp
--- a/projectmanagers/cmake/tests/cmakeprojectvisitortest.cpp
+++ b/projectmanagers/cmake/tests/cmakeprojectvisitortest.cpp
@@ -520,7 +520,7 @@
     results.clear();
     results << StringPair("result", "");
     QTest::newRow("empty set with scope") <<
-                            "set(result ${nonexistant} PARENT_SCOPE)\n"
+                            "set(result ${nonexistent} PARENT_SCOPE)\n"
                             << cacheValues << results;
 }