diff --git a/googlemock/docs/CookBook.md b/googlemock/docs/CookBook.md
index 3d07e68b82b2aba92c9303680dcca875a26d828c..c2565f1e18441d38263d6f5d1224f9eced11e28c 100644
--- a/googlemock/docs/CookBook.md
+++ b/googlemock/docs/CookBook.md
@@ -1231,7 +1231,7 @@ that references the implementation object dies, the implementation
 object will be deleted.
 
 Therefore, if you have some complex matcher that you want to use again
-and again, there is no need to build it everytime. Just assign it to a
+and again, there is no need to build it every time. Just assign it to a
 matcher variable and use that variable repeatedly! For example,
 
 ```
@@ -1403,7 +1403,7 @@ edge from node A to node B wherever A must occur before B, we can get
 a DAG. We use the term "sequence" to mean a directed path in this
 DAG. Now, if we decompose the DAG into sequences, we just need to know
 which sequences each `EXPECT_CALL()` belongs to in order to be able to
-reconstruct the orginal DAG.
+reconstruct the original DAG.
 
 So, to specify the partial order on the expectations we need to do two
 things: first to define some `Sequence` objects, and then for each
@@ -2182,7 +2182,7 @@ the implementation object dies, the implementation object will be
 deleted.
 
 If you have some complex action that you want to use again and again,
-you may not have to build it from scratch everytime. If the action
+you may not have to build it from scratch every time. If the action
 doesn't have an internal state (i.e. if it always does the same thing
 no matter how many times it has been called), you can assign it to an
 action variable and use that variable repeatedly. For example:
diff --git a/googlemock/include/gmock/gmock-matchers.h b/googlemock/include/gmock/gmock-matchers.h
index 41bf6de3b11ff04c773faa2977e82940e829f384..94c23d380cdc50fb623878f42b3f6091e2d19996 100644
--- a/googlemock/include/gmock/gmock-matchers.h
+++ b/googlemock/include/gmock/gmock-matchers.h
@@ -1550,7 +1550,7 @@ class BothOfMatcherImpl : public MatcherInterface<T> {
 // MatcherList provides mechanisms for storing a variable number of matchers in
 // a list structure (ListType) and creating a combining matcher from such a
 // list.
-// The template is defined recursively using the following template paramters:
+// The template is defined recursively using the following template parameters:
 //   * kSize is the length of the MatcherList.
 //   * Head is the type of the first matcher of the list.
 //   * Tail denotes the types of the remaining matchers of the list.
@@ -2379,7 +2379,7 @@ class ResultOfMatcher {
 
    private:
     // Functors often define operator() as non-const method even though
-    // they are actualy stateless. But we need to use them even when
+    // they are actually stateless. But we need to use them even when
     // 'this' is a const pointer. It's the user's responsibility not to
     // use stateful callables with ResultOf(), which does't guarantee
     // how many times the callable will be invoked.
diff --git a/googlemock/scripts/generator/cpp/ast.py b/googlemock/scripts/generator/cpp/ast.py
index 11cbe9126af5c24e692bb31554576cae927560cb..cce32724b58cddbd0e72deae1cfa37f716da7d80 100755
--- a/googlemock/scripts/generator/cpp/ast.py
+++ b/googlemock/scripts/generator/cpp/ast.py
@@ -338,7 +338,7 @@ class Class(_GenericDeclaration):
         # TODO(nnorwitz): handle namespaces, etc.
         if self.bases:
             for token_list in self.bases:
-                # TODO(nnorwitz): bases are tokens, do name comparision.
+                # TODO(nnorwitz): bases are tokens, do name comparison.
                 for token in token_list:
                     if token.name == node.name:
                         return True
@@ -381,7 +381,7 @@ class Function(_GenericDeclaration):
 
     def Requires(self, node):
         if self.parameters:
-            # TODO(nnorwitz): parameters are tokens, do name comparision.
+            # TODO(nnorwitz): parameters are tokens, do name comparison.
             for p in self.parameters:
                 if p.name == node.name:
                     return True
@@ -858,7 +858,7 @@ class AstBuilder(object):
             last_token = self._GetNextToken()
         return tokens, last_token
 
-    # TODO(nnorwitz): remove _IgnoreUpTo() it shouldn't be necesary.
+    # TODO(nnorwitz): remove _IgnoreUpTo() it shouldn't be necessary.
     def _IgnoreUpTo(self, token_type, token):
         unused_tokens = self._GetTokensUpTo(token_type, token)
 
diff --git a/googlemock/test/gmock-actions_test.cc b/googlemock/test/gmock-actions_test.cc
index f470de4c55cda3d5796faea4988249895ed6fcc8..f7218391ecfd30b3ba2f68333a3192d53036b30e 100644
--- a/googlemock/test/gmock-actions_test.cc
+++ b/googlemock/test/gmock-actions_test.cc
@@ -751,7 +751,7 @@ TEST(DoDefaultDeathTest, DiesIfUsedInCompositeAction) {
 }
 
 // Tests that DoDefault() returns the default value set by
-// DefaultValue<T>::Set() when it's not overriden by an ON_CALL().
+// DefaultValue<T>::Set() when it's not overridden by an ON_CALL().
 TEST(DoDefaultTest, ReturnsUserSpecifiedPerTypeDefaultValueWhenThereIsOne) {
   DefaultValue<int>::Set(1);
   MockClass mock;
diff --git a/googlemock/test/gmock-matchers_test.cc b/googlemock/test/gmock-matchers_test.cc
index 5c764eb443b109e204725bc4b2276f345d2ec916..07e5fa6346e3e9455c47982c1f01914a6b6a6c86 100644
--- a/googlemock/test/gmock-matchers_test.cc
+++ b/googlemock/test/gmock-matchers_test.cc
@@ -915,7 +915,7 @@ TEST(TypedEqTest, CanDescribeSelf) {
 // Type<T>::IsTypeOf(v) compiles iff the type of value v is T, where T
 // is a "bare" type (i.e. not in the form of const U or U&).  If v's
 // type is not T, the compiler will generate a message about
-// "undefined referece".
+// "undefined reference".
 template <typename T>
 struct Type {
   static bool IsTypeOf(const T& /* v */) { return true; }
@@ -1424,7 +1424,7 @@ TEST(PairTest, MatchesCorrectly) {
   EXPECT_THAT(p, Pair(25, "foo"));
   EXPECT_THAT(p, Pair(Ge(20), HasSubstr("o")));
 
-  // 'first' doesnt' match, but 'second' matches.
+  // 'first' does not match, but 'second' matches.
   EXPECT_THAT(p, Not(Pair(42, "foo")));
   EXPECT_THAT(p, Not(Pair(Lt(25), "foo")));
 
@@ -4263,7 +4263,7 @@ TYPED_TEST(ContainerEqTest, DuplicateDifference) {
 #endif  // GTEST_HAS_TYPED_TEST
 
 // Tests that mutliple missing values are reported.
-// Using just vector here, so order is predicatble.
+// Using just vector here, so order is predictable.
 TEST(ContainerEqExtraTest, MultipleValuesMissing) {
   static const int vals[] = {1, 1, 2, 3, 5, 8};
   static const int test_vals[] = {2, 1, 5};
@@ -4276,7 +4276,7 @@ TEST(ContainerEqExtraTest, MultipleValuesMissing) {
 }
 
 // Tests that added values are reported.
-// Using just vector here, so order is predicatble.
+// Using just vector here, so order is predictable.
 TEST(ContainerEqExtraTest, MultipleValuesAdded) {
   static const int vals[] = {1, 1, 2, 3, 5, 8};
   static const int test_vals[] = {1, 2, 92, 3, 5, 8, 46};
diff --git a/googletest/docs/FAQ.md b/googletest/docs/FAQ.md
index 1a216a1a64bb147170f552ce3c46de890d7fcf1a..bd9526de217f189c51020e67c384f83af867157d 100644
--- a/googletest/docs/FAQ.md
+++ b/googletest/docs/FAQ.md
@@ -460,7 +460,7 @@ following benefits:
 You may still want to use `SetUp()/TearDown()` in the following rare cases:
   * If the tear-down operation could throw an exception, you must use `TearDown()` as opposed to the destructor, as throwing in a destructor leads to undefined behavior and usually will kill your program right away. Note that many standard libraries (like STL) may throw when exceptions are enabled in the compiler. Therefore you should prefer `TearDown()` if you want to write portable tests that work with or without exceptions.
   * The assertion macros throw an exception when flag `--gtest_throw_on_failure` is specified. Therefore, you shouldn't use Google Test assertions in a destructor if you plan to run your tests with this flag.
-  * In a constructor or destructor, you cannot make a virtual function call on this object. (You can call a method declared as virtual, but it will be statically bound.) Therefore, if you need to call a method that will be overriden in a derived class, you have to use `SetUp()/TearDown()`.
+  * In a constructor or destructor, you cannot make a virtual function call on this object. (You can call a method declared as virtual, but it will be statically bound.) Therefore, if you need to call a method that will be overridden in a derived class, you have to use `SetUp()/TearDown()`.
 
 ## The compiler complains "no matching function to call" when I use ASSERT\_PREDn. How do I fix it? ##
 
diff --git a/googletest/include/gtest/internal/gtest-filepath.h b/googletest/include/gtest/internal/gtest-filepath.h
index 406597a44f1a478e059d5c8981c7aa6bb5e03f8b..bce50dc6ec6cc16d0772cf04a125fa7a8ac857f5 100644
--- a/googletest/include/gtest/internal/gtest-filepath.h
+++ b/googletest/include/gtest/internal/gtest-filepath.h
@@ -191,7 +191,7 @@ class GTEST_API_ FilePath {
 
   void Normalize();
 
-  // Returns a pointer to the last occurence of a valid path separator in
+  // Returns a pointer to the last ioccurrence of a valid path separator in
   // the FilePath. On Windows, for example, both '/' and '\' are valid path
   // separators. Returns NULL if no path separator was found.
   const char* FindLastPathSeparator() const;
diff --git a/googletest/src/gtest-filepath.cc b/googletest/src/gtest-filepath.cc
index a1fc0e371a3ffabfa5d0332285188df86d216bf9..6b76ea0f3700e038d7f675b3ebe8180dd832501c 100644
--- a/googletest/src/gtest-filepath.cc
+++ b/googletest/src/gtest-filepath.cc
@@ -128,7 +128,7 @@ FilePath FilePath::RemoveExtension(const char* extension) const {
   return *this;
 }
 
-// Returns a pointer to the last occurence of a valid path separator in
+// Returns a pointer to the last occurrence of a valid path separator in
 // the FilePath. On Windows, for example, both '/' and '\' are valid path
 // separators. Returns NULL if no path separator was found.
 const char* FilePath::FindLastPathSeparator() const {
diff --git a/googletest/src/gtest-printers.cc b/googletest/src/gtest-printers.cc
index 1bdf243d8149882103a14168840be295be9c966e..fe70edcfeec774c330e5ba457d851fb2ae09d396 100644
--- a/googletest/src/gtest-printers.cc
+++ b/googletest/src/gtest-printers.cc
@@ -124,7 +124,7 @@ namespace internal {
 // Depending on the value of a char (or wchar_t), we print it in one
 // of three formats:
 //   - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
-//   - as a hexidecimal escape sequence (e.g. '\x7F'), or
+//   - as a hexadecimal escape sequence (e.g. '\x7F'), or
 //   - as a special escape sequence (e.g. '\r', '\n').
 enum CharFormat {
   kAsIs,
@@ -231,7 +231,7 @@ void PrintCharAndCodeTo(Char c, ostream* os) {
     return;
   *os << " (" << static_cast<int>(c);
 
-  // For more convenience, we print c's code again in hexidecimal,
+  // For more convenience, we print c's code again in hexadecimal,
   // unless c was already printed in the form '\x##' or the code is in
   // [1, 9].
   if (format == kHexEscape || (1 <= c && c <= 9)) {
diff --git a/googletest/src/gtest.cc b/googletest/src/gtest.cc
index 2c25f838c9b7e3f401d1ed8853a1bb0b43b0a6ad..ee555bc9fa8b5866f07297f5253c12940232297e 100644
--- a/googletest/src/gtest.cc
+++ b/googletest/src/gtest.cc
@@ -1718,7 +1718,7 @@ AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
 // Utility functions for encoding Unicode text (wide strings) in
 // UTF-8.
 
-// A Unicode code-point can have upto 21 bits, and is encoded in UTF-8
+// A Unicode code-point can have up to 21 bits, and is encoded in UTF-8
 // like this:
 //
 // Code-point length   Encoding
diff --git a/googletest/test/gtest-printers_test.cc b/googletest/test/gtest-printers_test.cc
index 0860abf5dc84e7dafa5747ae007396cbf49e737c..60a8d037a0a305c2f8241f1b3adab08a9d90793a 100644
--- a/googletest/test/gtest-printers_test.cc
+++ b/googletest/test/gtest-printers_test.cc
@@ -1327,7 +1327,7 @@ TEST(FormatForComparisonFailureMessageTest, FormatsNonCharArrayAsPointer) {
 }
 
 // Tests formatting a char pointer when it's compared with another pointer.
-// In this case we want to print it as a raw pointer, as the comparision is by
+// In this case we want to print it as a raw pointer, as the comparison is by
 // pointer.
 
 // char pointer vs pointer
diff --git a/googletest/test/gtest_test_utils.py b/googletest/test/gtest_test_utils.py
index 7c489336c541bf618d9c8a8d3e0c410626b54941..cc4ba6498f6750f7cde70cd679ae7c351bbc51b1 100755
--- a/googletest/test/gtest_test_utils.py
+++ b/googletest/test/gtest_test_utils.py
@@ -227,7 +227,7 @@ class Subprocess:
                                combined in a string.
     """
 
-    # The subprocess module is the preferrable way of running programs
+    # The subprocess module is the preferable way of running programs
     # since it is available and behaves consistently on all platforms,
     # including Windows. But it is only available starting in python 2.4.
     # In earlier python versions, we revert to the popen2 module, which is
diff --git a/googletest/test/gtest_unittest.cc b/googletest/test/gtest_unittest.cc
index a45927d0db7715c9218826e14934c9faf62c2b87..2ea3ca4aff29340dcf67b16111b174fa857b9010 100644
--- a/googletest/test/gtest_unittest.cc
+++ b/googletest/test/gtest_unittest.cc
@@ -538,7 +538,7 @@ TEST(CodePointToUtf8Test, CanEncode8To11Bits) {
 
   // 101 0111 0110 => 110-10101 10-110110
   // Some compilers (e.g., GCC on MinGW) cannot handle non-ASCII codepoints
-  // in wide strings and wide chars. In order to accomodate them, we have to
+  // in wide strings and wide chars. In order to accommodate them, we have to
   // introduce such character constants as integers.
   EXPECT_EQ("\xD5\xB6",
             CodePointToUtf8(static_cast<wchar_t>(0x576)));
@@ -1779,7 +1779,7 @@ TEST(Int32FromEnvOrDieDeathTest, AbortsOnFailure) {
 }
 
 // Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable cannot be represnted by an Int32.
+// if the variable cannot be represented by an Int32.
 TEST(Int32FromEnvOrDieDeathTest, AbortsOnInt32Overflow) {
   SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "1234567891234567891234");
   EXPECT_DEATH_IF_SUPPORTED(
@@ -3658,7 +3658,7 @@ TEST(AssertionTest, AssertFalseWithAssertionResult) {
 }
 
 #ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" supressed them
+// Restores warnings after previous "#pragma option push" suppressed them
 # pragma option pop
 #endif
 
@@ -4384,7 +4384,7 @@ TEST(ExpectTest, ExpectFalseWithAssertionResult) {
 }
 
 #ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" supressed them
+// Restores warnings after previous "#pragma option push" suppressed them
 # pragma option pop
 #endif
 
@@ -6642,7 +6642,7 @@ TEST(StreamingAssertionsTest, Truth2) {
 }
 
 #ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" supressed them
+// Restores warnings after previous "#pragma option push" suppressed them
 # pragma option pop
 #endif
 
diff --git a/googletest/xcode/Scripts/versiongenerate.py b/googletest/xcode/Scripts/versiongenerate.py
index 16791d25321db8193f8b4901a38d2b8a3134f348..bdd7541ad797fa673f65da38168e1580fd7dde3a 100755
--- a/googletest/xcode/Scripts/versiongenerate.py
+++ b/googletest/xcode/Scripts/versiongenerate.py
@@ -29,7 +29,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""A script to prepare version informtion for use the gtest Info.plist file.
+"""A script to prepare version information for use the gtest Info.plist file.
 
   This script extracts the version information from the configure.ac file and
   uses it to generate a header file containing the same information. The