diff --git a/examples/README.txt b/examples/README.txt
index e6f3037..b33f841 100644
--- a/examples/README.txt
+++ b/examples/README.txt
@@ -35,7 +35,7 @@
   https://github.com/golang/protobuf
 for more information about Go protocol buffer support.
 
-First, install the the Protocol Buffers compiler (protoc).
+First, install the Protocol Buffers compiler (protoc).
 Then, install the Go Protocol Buffers plugin
 ($GOPATH/bin must be in your $PATH for protoc to find it):
   go get github.com/golang/protobuf/protoc-gen-go
diff --git a/java/core/src/main/java/com/google/protobuf/RopeByteString.java b/java/core/src/main/java/com/google/protobuf/RopeByteString.java
index 469c90c..8badfab 100644
--- a/java/core/src/main/java/com/google/protobuf/RopeByteString.java
+++ b/java/core/src/main/java/com/google/protobuf/RopeByteString.java
@@ -187,7 +187,7 @@
           && leftRope.getTreeDepth() > right.getTreeDepth()) {
         // Typically for concatenate-built strings the left-side is deeper than
         // the right.  This is our final attempt to concatenate without
-        // increasing the tree depth.  We'll redo the the node on the RHS.  This
+        // increasing the tree depth.  We'll redo the node on the RHS.  This
         // is yet another optimization for building the string by repeatedly
         // concatenating on the right.
         ByteString newRight = new RopeByteString(leftRope.right, right);
diff --git a/java/core/src/main/java/com/google/protobuf/UnsafeByteOperations.java b/java/core/src/main/java/com/google/protobuf/UnsafeByteOperations.java
index 8806395..f443ee3 100644
--- a/java/core/src/main/java/com/google/protobuf/UnsafeByteOperations.java
+++ b/java/core/src/main/java/com/google/protobuf/UnsafeByteOperations.java
@@ -38,7 +38,7 @@
  * potentially expose the backing buffer of a {@link ByteString} to the application.
  *
  * <p><strong>DISCLAIMER:</strong> The methods in this class should only be called if it is
- * guaranteed that the the buffer backing the {@link ByteString} will never change! Mutation of a
+ * guaranteed that the buffer backing the {@link ByteString} will never change! Mutation of a
  * {@link ByteString} can lead to unexpected and undesirable consequences in your application,
  * and will likely be difficult to debug. Proceed with caution!
  */
diff --git a/objectivec/DevTools/pddm.py b/objectivec/DevTools/pddm.py
index d1b53f5..9a11fec 100755
--- a/objectivec/DevTools/pddm.py
+++ b/objectivec/DevTools/pddm.py
@@ -625,8 +625,7 @@
 def main(args):
   usage = '%prog [OPTIONS] PATH ...'
   description = (
-      'Processes PDDM directives in the the given paths and write them back'
-      ' out.'
+      'Processes PDDM directives in the given paths and write them back out.'
   )
   parser = optparse.OptionParser(usage=usage, description=description)
   parser.add_option('--dry-run',
diff --git a/objectivec/GPBUtilities.m b/objectivec/GPBUtilities.m
index eaa28bb..d4d6471 100644
--- a/objectivec/GPBUtilities.m
+++ b/objectivec/GPBUtilities.m
@@ -1253,7 +1253,7 @@
   if ([fieldName length] == 0) {
     fieldName = [NSString stringWithFormat:@"%u", GPBFieldNumber(field)];
     // If there is only one entry, put the objc name as a comment, other wise
-    // add it before the the repeated values.
+    // add it before the repeated values.
     if (count > 1) {
       [toStr appendFormat:@"%@# %@\n", lineIndent, field.name];
     } else {
diff --git a/ruby/ext/google/protobuf_c/upb.c b/ruby/ext/google/protobuf_c/upb.c
index 048a163..9e6aa67 100644
--- a/ruby/ext/google/protobuf_c/upb.c
+++ b/ruby/ext/google/protobuf_c/upb.c
@@ -8537,7 +8537,7 @@
 **       to perfectly match the output of reference encoders that always use the
 **       optimal amount of space for each length.
 **
-**   (2) requires guessing the the size upfront, and if multiple lengths are
+**   (2) requires guessing the size upfront, and if multiple lengths are
 **       guessed wrong the minimum required number of memmove() operations may
 **       be complicated to compute correctly.  Implemented properly, it may have
 **       a useful amortized or average cost, but more investigation is required
diff --git a/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc b/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc
index 990aca2..8527b74 100644
--- a/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc
+++ b/src/google/protobuf/compiler/objectivec/objectivec_helpers.cc
@@ -883,7 +883,7 @@
     StringPiece prefix(line, offset + 1, line.length() - offset - 1);
     TrimWhitespace(&package);
     TrimWhitespace(&prefix);
-    // Don't really worry about error checking the the package/prefix for
+    // Don't really worry about error checking the package/prefix for
     // being valid.  Assume the file is validated when it is created/edited.
     (*prefix_map_)[package.ToString()] = prefix.ToString();
   }
diff --git a/src/google/protobuf/compiler/objectivec/objectivec_helpers.h b/src/google/protobuf/compiler/objectivec/objectivec_helpers.h
index 072a2e5..8574486 100644
--- a/src/google/protobuf/compiler/objectivec/objectivec_helpers.h
+++ b/src/google/protobuf/compiler/objectivec/objectivec_helpers.h
@@ -64,7 +64,7 @@
 
 // Gets the name of the root class we'll generate in the file.  This class
 // is not meant for external consumption, but instead contains helpers that
-// the rest of the the classes need
+// the rest of the classes need
 string FileClassName(const FileDescriptor* file);
 
 // These return the fully-qualified class name corresponding to the given
@@ -148,7 +148,7 @@
 bool ValidateObjCClassPrefix(const FileDescriptor* file, string *out_error);
 
 // Generate decode data needed for ObjC's GPBDecodeTextFormatName() to transform
-// the input into the the expected output.
+// the input into the expected output.
 class LIBPROTOC_EXPORT TextFormatDecodeData {
  public:
   TextFormatDecodeData() {}
diff --git a/src/google/protobuf/dynamic_message.cc b/src/google/protobuf/dynamic_message.cc
index bb40047..8d689ac 100644
--- a/src/google/protobuf/dynamic_message.cc
+++ b/src/google/protobuf/dynamic_message.cc
@@ -419,7 +419,7 @@
   }
 
   // We need to manually run the destructors for repeated fields and strings,
-  // just as we ran their constructors in the the DynamicMessage constructor.
+  // just as we ran their constructors in the DynamicMessage constructor.
   // We also need to manually delete oneof fields if it is set and is string
   // or message.
   // Additionally, if any singular embedded messages have been allocated, we
diff --git a/src/google/protobuf/util/field_mask_util.cc b/src/google/protobuf/util/field_mask_util.cc
index 29ca9c1..c59f43a 100644
--- a/src/google/protobuf/util/field_mask_util.cc
+++ b/src/google/protobuf/util/field_mask_util.cc
@@ -103,7 +103,7 @@
   // Add a field path into the tree. In a FieldMask, each field path matches
   // the specified field and also all its sub-fields. If the field path to
   // add is a sub-path of an existing field path in the tree (i.e., a leaf
-  // node), it means the tree already matchesthe the given path so nothing will
+  // node), it means the tree already matches the given path so nothing will
   // be added to the tree. If the path matches an existing non-leaf node in the
   // tree, that non-leaf node will be turned into a leaf node with all its
   // children removed because the path matches all the node's children.