diff --git a/extensions/GUI/CCControlExtension/CCControl.cpp b/extensions/GUI/CCControlExtension/CCControl.cpp
index 417627191d..66f81aa9b7 100644
--- a/extensions/GUI/CCControlExtension/CCControl.cpp
+++ b/extensions/GUI/CCControlExtension/CCControl.cpp
@@ -107,7 +107,7 @@ void Control::sendActionsForControlEvents(EventType controlEvents)
     // For each control events
     for (int i = 0; i < kControlEventTotalNumber; i++)
     {
-        // If the given controlEvents bitmask contains the curent event
+        // If the given controlEvents bitmask contains the current event
         if (((int)controlEvents & (1 << i)))
         {
             // Call invocations
@@ -135,7 +135,7 @@ void Control::addTargetWithActionForControlEvents(Ref* target, Handler action, E
     // For each control events
     for (int i = 0; i < kControlEventTotalNumber; i++)
     {
-        // If the given controlEvents bitmask contains the curent event
+        // If the given controlEvents bitmask contains the current event
         if (((int)controlEvents & (1 << i)))
         {
             this->addTargetWithActionForControlEvent(target, action, (EventType)(1<<i));
@@ -148,7 +148,7 @@ void Control::addTargetWithActionForControlEvents(Ref* target, Handler action, E
 /**
  * Adds a target and action for a particular event to an internal dispatch 
  * table.
- * The action message may optionnaly include the sender and the event as 
+ * The action message may optionally include the sender and the event as 
  * parameters, in that order.
  * When you call this method, target is not retained.
  *
@@ -173,7 +173,7 @@ void Control::removeTargetWithActionForControlEvents(Ref* target, Handler action
      // For each control events
     for (int i = 0; i < kControlEventTotalNumber; i++)
     {
-        // If the given controlEvents bitmask contains the curent event
+        // If the given controlEvents bitmask contains the current event
         if (((int)controlEvents & (1 << i)))
         {
             this->removeTargetWithActionForControlEvent(target, action, (EventType)(1 << i));
diff --git a/extensions/GUI/CCControlExtension/CCControl.h b/extensions/GUI/CCControlExtension/CCControl.h
index e4842d047a..7c25caec6b 100644
--- a/extensions/GUI/CCControlExtension/CCControl.h
+++ b/extensions/GUI/CCControlExtension/CCControl.h
@@ -84,7 +84,7 @@ public:
     /** The possible state for a control.  */
     enum class State
     {
-        NORMAL         = 1 << 0, // The normal, or default state of a control¡ªthat is, enabled but neither selected nor highlighted.
+        NORMAL         = 1 << 0, // The normal, or default state of a control that is, enabled but neither selected nor highlighted.
         HIGH_LIGHTED   = 1 << 1, // Highlighted state of a control. A control enters this state when a touch down, drag inside or drag enter is performed. You can retrieve and set this value through the highlighted property.
         DISABLED       = 1 << 2, // Disabled state of a control. This state indicates that the control is currently disabled. You can retrieve and set this value through the enabled property.
         SELECTED       = 1 << 3  // Selected state of a control. This state indicates that the control is currently selected. You can retrieve and set this value through the selected property.
@@ -122,7 +122,7 @@ public:
     /**
      * Adds a target and action for a particular event (or events) to an internal
      * dispatch table.
-     * The action message may optionnaly include the sender and the event as
+     * The action message may optionally include the sender and the event as
      * parameters, in that order.
      * When you call this method, target is not retained.
      *
@@ -138,7 +138,7 @@ public:
      * Removes a target and action for a particular event (or events) from an
      * internal dispatch table.
      *
-     * @param target The target object—that is, the object to which the action
+     * @param target The target object that is, the object to which the action
      * message is sent. Pass nil to remove all targets paired with action and the
      * specified control events.
      * @param action A selector identifying an action message. Pass NULL to remove
@@ -149,7 +149,7 @@ public:
     virtual void removeTargetWithActionForControlEvents(Ref* target, Handler action, EventType controlEvents);
 
     /**
-     * Returns a point corresponding to the touh location converted into the
+     * Returns a point corresponding to the touch location converted into the
      * control space coordinates.
      * @param touch A Touch object that represents a touch.
      */
@@ -190,7 +190,7 @@ CC_CONSTRUCTOR_ACCESS:
 protected:
     /**
      * Returns an Invocation object able to construct messages using a given 
-     * target-action pair. (The invocation may optionnaly include the sender and
+     * target-action pair. (The invocation may optionally include the sender and
      * the event as parameters, in that order)
      *
      * @param target The target object.
@@ -217,11 +217,11 @@ protected:
     /**
      * Adds a target and action for a particular event to an internal dispatch 
      * table.
-     * The action message may optionnaly include the sender and the event as 
+     * The action message may optionally include the sender and the event as 
      * parameters, in that order.
      * When you call this method, target is not retained.
      *
-     * @param target The target object¡ªthat is, the object to which the action 
+     * @param target The target object that is, the object to which the action
      * message is sent. It cannot be nil. The target is not retained.
      * @param action A selector identifying an action message. It cannot be NULL.
      * @param controlEvent A control event for which the action message is sent.
@@ -233,7 +233,7 @@ protected:
      * Removes a target and action for a particular event from an internal dispatch
      * table.
      *
-     * @param target The target object¡ªthat is, the object to which the action 
+     * @param target The target object that is, the object to which the action
      * message is sent. Pass nil to remove all targets paired with action and the
      * specified control events.
      * @param action A selector identifying an action message. Pass NULL to remove
diff --git a/extensions/GUI/CCControlExtension/CCControlButton.h b/extensions/GUI/CCControlExtension/CCControlButton.h
index 302b8c8ec9..4c7dc27511 100644
--- a/extensions/GUI/CCControlExtension/CCControlButton.h
+++ b/extensions/GUI/CCControlExtension/CCControlButton.h
@@ -134,7 +134,7 @@ public:
     virtual float getTitleTTFSizeForState(State state);
 
     /**
-     * Sets the font of the label, changes the label to a BMFont if neccessary.
+     * Sets the font of the label, changes the label to a BMFont if necessary.
      * @param fntFile The name of the font to change to
      * @param state The state that uses the specified fntFile. The values are described
      * in "CCControlState".
diff --git a/extensions/GUI/CCControlExtension/CCControlHuePicker.h b/extensions/GUI/CCControlExtension/CCControlHuePicker.h
index bca41ba1c6..b2bb21dbd9 100644
--- a/extensions/GUI/CCControlExtension/CCControlHuePicker.h
+++ b/extensions/GUI/CCControlExtension/CCControlHuePicker.h
@@ -71,7 +71,7 @@ protected:
     void updateSliderPosition(Vec2 location);
     bool checkSliderPosition(Vec2 location);
 
-    //maunally put in the setters
+    //manually put in the setters
     CC_SYNTHESIZE_READONLY(float, _hue, Hue);
     virtual void setHue(float val);
     CC_SYNTHESIZE_READONLY(float, _huePercentage, HuePercentage);
diff --git a/extensions/GUI/CCControlExtension/CCControlSlider.h b/extensions/GUI/CCControlExtension/CCControlSlider.h
index e2196c6b8f..fec34ca07c 100644
--- a/extensions/GUI/CCControlExtension/CCControlSlider.h
+++ b/extensions/GUI/CCControlExtension/CCControlSlider.h
@@ -129,7 +129,7 @@ protected:
     /** Returns the value for the given location. */
     float valueForLocation(Vec2 location);
 
-    //maunally put in the setters
+    //manually put in the setters
     /** Contains the receiver's current value. */
     CC_SYNTHESIZE_READONLY(float, _value, Value);
 
diff --git a/extensions/GUI/CCScrollView/CCScrollView.h b/extensions/GUI/CCScrollView/CCScrollView.h
index f621169493..47dc14b235 100644
--- a/extensions/GUI/CCScrollView/CCScrollView.h
+++ b/extensions/GUI/CCScrollView/CCScrollView.h
@@ -323,7 +323,7 @@ protected:
      */
     Node* _container;
     /**
-     * Determiens whether user touch is moved after begin phase.
+     * Determines whether user touch is moved after begin phase.
      */
     bool _touchMoved;
     /**
diff --git a/extensions/Particle3D/PU/CCPUAffector.h b/extensions/Particle3D/PU/CCPUAffector.h
index 87d9bf3f1d..e1c564fd90 100644
--- a/extensions/Particle3D/PU/CCPUAffector.h
+++ b/extensions/Particle3D/PU/CCPUAffector.h
@@ -119,7 +119,7 @@ protected:
         /** Although the scale is on a Particle System level, the affector can also be scaled.
     */
     Vec3 _affectorScale;
-        /** Because the public attribute ´position?is sometimes used for both localspace and worldspace
+        /** Because the public attribute position is sometimes used for both localspace and worldspace
         position, the mDerivedPosition attribute is introduced.
     */
     Vec3 _derivedPosition;
diff --git a/extensions/Particle3D/PU/CCPUAffectorTranslator.cpp b/extensions/Particle3D/PU/CCPUAffectorTranslator.cpp
index 687019adb0..49b5397694 100644
--- a/extensions/Particle3D/PU/CCPUAffectorTranslator.cpp
+++ b/extensions/Particle3D/PU/CCPUAffectorTranslator.cpp
@@ -104,7 +104,7 @@ void PUAffectorTranslator::translate(PUScriptCompiler* compiler, PUAbstractNode
             }
             else if (prop->name == token[TOKEN_POSITION])
             {
-                // Property: positon
+                // Property: position
                 if (passValidateProperty(compiler, prop, token[TOKEN_POSITION], VAL_VECTOR3))
                 {
                     Vec3 val;
diff --git a/extensions/Particle3D/PU/CCPUDoPlacementParticleEventHandler.h b/extensions/Particle3D/PU/CCPUDoPlacementParticleEventHandler.h
index 03a97973ff..d3bded8a11 100644
--- a/extensions/Particle3D/PU/CCPUDoPlacementParticleEventHandler.h
+++ b/extensions/Particle3D/PU/CCPUDoPlacementParticleEventHandler.h
@@ -107,7 +107,7 @@ public:
     bool alwaysUsePosition(void) const {return _alwaysUsePosition;};
 
     /** Set the boolean to indicate whether the position of the particle that is handled must be used for emission of 
-        the new particle or whether the contact point of the physics actor must be used. This only applies if a physics angine
+        the new particle or whether the contact point of the physics actor must be used. This only applies if a physics engine
         is used, otherwise the default is used.
     */
     void setAlwaysUsePosition(bool alwaysUsePosition) {_alwaysUsePosition = alwaysUsePosition;};
@@ -143,14 +143,14 @@ protected:
 
     /** Store the technique value to keep up to speed.
     @remarks
-        If the ParticleTechnique has been destroyed, the DoPlacementParticleEventHandler isn´t automatically
+        If the ParticleTechnique has been destroyed, the DoPlacementParticleEventHandler isn't automatically
         notified. Using the pointer causes an exception.
     */
     PUParticleSystem3D* _system;
 
     /** Store the emitter value to keep up to speed.
     @remarks
-        If the ParticleEmitter has been destroyed, the DoPlacementParticleEventHandler isn´t automatically
+        If the ParticleEmitter has been destroyed, the DoPlacementParticleEventHandler isn't automatically
         notified. Using the pointer causes an exception.
     */
     PUEmitter* _emitter;
diff --git a/extensions/Particle3D/PU/CCPUDynamicAttribute.h b/extensions/Particle3D/PU/CCPUDynamicAttribute.h
index 2a235756f3..70dc447305 100644
--- a/extensions/Particle3D/PU/CCPUDynamicAttribute.h
+++ b/extensions/Particle3D/PU/CCPUDynamicAttribute.h
@@ -258,7 +258,7 @@ class CC_DLL PUDynamicAttributeCurved : public PUDynamicAttribute
         inline ControlPointList::iterator getLastValidIterator(void);
 };
 
-/* This class generates values based on an oscillating functione (i.e. Sine).
+/* This class generates values based on an oscillating function (i.e. Sine).
 */
 class CC_DLL PUDynamicAttributeOscillate : public PUDynamicAttribute
 {
diff --git a/extensions/Particle3D/PU/CCPUEmitterTranslator.cpp b/extensions/Particle3D/PU/CCPUEmitterTranslator.cpp
index e760b5e51b..0cfa89f37f 100644
--- a/extensions/Particle3D/PU/CCPUEmitterTranslator.cpp
+++ b/extensions/Particle3D/PU/CCPUEmitterTranslator.cpp
@@ -108,7 +108,7 @@ void PUEmitterTranslator::translate(PUScriptCompiler* compiler, PUAbstractNode *
             }
             else if (prop->name == token[TOKEN_POSITION])
             {
-                // Property: positon
+                // Property: position
                 if (passValidateProperty(compiler, prop, token[TOKEN_POSITION], VAL_VECTOR3))
                 {
                     Vec3 val;
diff --git a/extensions/Particle3D/PU/CCPUMeshSurfaceEmitter.h b/extensions/Particle3D/PU/CCPUMeshSurfaceEmitter.h
index cb153007d7..a779fa174b 100644
--- a/extensions/Particle3D/PU/CCPUMeshSurfaceEmitter.h
+++ b/extensions/Particle3D/PU/CCPUMeshSurfaceEmitter.h
@@ -133,7 +133,7 @@ public:
     /** Destructor **/
     ~MeshInfo (void);
 
-    /** Generate a random number. The ´high?argument determines that numbers are 
+    /** Generate a random number. The high argument determines that numbers are 
         returned between [0..high] **/
     float getGaussianRandom (float high, float cutoff = 4);
 
@@ -196,7 +196,7 @@ public:
     /** Returns the type op distribution.
     @remarks
         There are several ways to emit particles on the surface of a mesh. This attribute indicates
-        the type of distrubution on the surface.
+        the type of distribution on the surface.
     */
     const MeshInfo::MeshSurfaceDistribution getDistribution (void) const;
 
diff --git a/extensions/Particle3D/PU/CCPUObserver.cpp b/extensions/Particle3D/PU/CCPUObserver.cpp
index 9920da403a..ca2111b9aa 100644
--- a/extensions/Particle3D/PU/CCPUObserver.cpp
+++ b/extensions/Particle3D/PU/CCPUObserver.cpp
@@ -198,7 +198,7 @@ void PUObserver::destroyEventHandler(PUEventHandler* eventHandler)
     {
         if (*it == eventHandler)
         {
-            // Detroy it
+            // Destroy it
             //ParticleSystemManager::getSingletonPtr()->destroyEventHandler(*it);
             (*it)->release();
             _eventHandlers.erase(it);
diff --git a/extensions/Particle3D/PU/CCPUObserver.h b/extensions/Particle3D/PU/CCPUObserver.h
index 06afd0e012..1939254d2e 100644
--- a/extensions/Particle3D/PU/CCPUObserver.h
+++ b/extensions/Particle3D/PU/CCPUObserver.h
@@ -159,7 +159,7 @@ public:
     bool getObserveUntilEvent(void) const;
 
     /** Sets the value of mObserveUntilEvent. This value determines whether observation must be continued
-        after an event ocurred and the event handlers are called.
+        after an event occurred and the event handlers are called.
     */
     void setObserveUntilEvent(bool observeUntilEvent);
 
@@ -213,8 +213,8 @@ protected:
     // Particle type to be observed. Default is that all particles are observed.
     PUParticle3D::ParticleType _particleTypeToObserve;
 
-    /** Determines whether mParticleTypeToObserve is set. If ´true? only that particles of the specified type
-        are observed. If ´false?(= default), all particles are observed.
+    /** Determines whether mParticleTypeToObserve is set. If true only that particles of the specified type
+        are observed. If false (= default), all particles are observed.
     */
     bool _particleTypeToObserveSet;
 
diff --git a/extensions/Particle3D/PU/CCPUOnClearObserver.h b/extensions/Particle3D/PU/CCPUOnClearObserver.h
index b54ffc97bd..be06b9cbff 100644
--- a/extensions/Particle3D/PU/CCPUOnClearObserver.h
+++ b/extensions/Particle3D/PU/CCPUOnClearObserver.h
@@ -50,13 +50,13 @@ public:
     */
     virtual bool observe (PUParticle3D* particle, float timeElapsed) override;
 
-    /** The _processParticle() function is overridden, because we don´t observe an individual particle.
-        even if there isn´t a particle left anymore (and that is the situation we want to validate).
+    /** The _processParticle() function is overridden, because we don't observe an individual particle.
+        even if there isn't a particle left anymore (and that is the situation we want to validate).
     */
     virtual void updateObserver(PUParticle3D* particle, float timeElapsed, bool firstParticle) override;
 
     /** Instead of the _processParticle(), the _postProcessParticles() is used because it is called
-        even if there isn´t a particle left anymore (and that is the situation we want to validate).
+        even if there isn't a particle left anymore (and that is the situation we want to validate).
     */
     virtual void postUpdateObserver(float timeElapsed) override;
 
diff --git a/extensions/Particle3D/PU/CCPUParticleSystem3D.cpp b/extensions/Particle3D/PU/CCPUParticleSystem3D.cpp
index 13542a0609..5281b66a1c 100755
--- a/extensions/Particle3D/PU/CCPUParticleSystem3D.cpp
+++ b/extensions/Particle3D/PU/CCPUParticleSystem3D.cpp
@@ -1011,7 +1011,7 @@ void PUParticleSystem3D::initParticleForExpiration( PUParticle3D* particle, floa
         it->particleExpired(this, particle);
     }
     ///** Externs are also called to perform expiration activities. If needed, affectors and emitters may be added, but at the moment
-    //	there is no reason for (and we don´t want to waste cpu resources).
+    //	there is no reason for (and we don't want to waste cpu resources).
     //*/
     //if (!mExterns.empty())
     //{
diff --git a/extensions/Particle3D/PU/CCPURandomiserTranslator.cpp b/extensions/Particle3D/PU/CCPURandomiserTranslator.cpp
index 1c734cc23d..27d4162237 100644
--- a/extensions/Particle3D/PU/CCPURandomiserTranslator.cpp
+++ b/extensions/Particle3D/PU/CCPURandomiserTranslator.cpp
@@ -55,7 +55,7 @@ bool PURandomiserTranslator::translateChildProperty( PUScriptCompiler* compiler,
     }
     else if (prop->name == token[TOKEN_RND_MAX_DEVIATION_X])
     {
-        // Property: rand_aff_max_deviation_x (depreacted and replaced by 'max_deviation_x')
+        // Property: rand_aff_max_deviation_x (deprecated and replaced by 'max_deviation_x')
         if (passValidateProperty(compiler, prop, token[TOKEN_RND_MAX_DEVIATION_X], VAL_REAL))
         {
             float val = 0.0f;
diff --git a/extensions/Particle3D/PU/CCPUTechniqueTranslator.cpp b/extensions/Particle3D/PU/CCPUTechniqueTranslator.cpp
index 4425a63518..0c2149173f 100644
--- a/extensions/Particle3D/PU/CCPUTechniqueTranslator.cpp
+++ b/extensions/Particle3D/PU/CCPUTechniqueTranslator.cpp
@@ -89,7 +89,7 @@ void PUTechniqueTranslator::translate(PUScriptCompiler* compiler, PUAbstractNode
             }
             else if (prop->name == token[TOKEN_POSITION])
             {
-                // Property: positon
+                // Property: position
                 if (passValidateProperty(compiler, prop, token[TOKEN_POSITION], VAL_VECTOR3))
                 {
                     Vec3 val;
diff --git a/extensions/Particle3D/PU/CCPUTextureRotator.h b/extensions/Particle3D/PU/CCPUTextureRotator.h
index ec9504c5a7..3dc1b71f9f 100644
--- a/extensions/Particle3D/PU/CCPUTextureRotator.h
+++ b/extensions/Particle3D/PU/CCPUTextureRotator.h
@@ -62,7 +62,7 @@ public:
     */
     void setRotationSpeed(PUDynamicAttribute* dynRotationSpeed);
 
-    /** Returns the rotation defined in the the affector.
+    /** Returns the rotation defined in the affector.
     */
     PUDynamicAttribute* getRotation(void) const;
 
diff --git a/extensions/Particle3D/PU/CCPUVertexEmitter.h b/extensions/Particle3D/PU/CCPUVertexEmitter.h
index 4945d66047..7940d36082 100644
--- a/extensions/Particle3D/PU/CCPUVertexEmitter.h
+++ b/extensions/Particle3D/PU/CCPUVertexEmitter.h
@@ -62,9 +62,9 @@ NS_CC_BEGIN
 //	/** Defines the speed of generating spawnpoints. In each Particle Technique update
 //		'mIterations' vertices are traversed.
 //	@remarks
-//		Setting this attribute to a higher value is needed if the emssion rate of the emitter
+//		Setting this attribute to a higher value is needed if the emission rate of the emitter
 //		is high. On slower computers, emitting the particles may exceed generating the 
-//		spawnpoints (because this is not done at once, but per Particle Tehcnique update).
+//		spawnpoints (because this is not done at once, but per Particle Technique update).
 //	*/
 //	unsigned short mIterations;
 //
diff --git a/extensions/assets-manager/AssetsManager.cpp b/extensions/assets-manager/AssetsManager.cpp
index 50b71da88b..962019fcee 100644
--- a/extensions/assets-manager/AssetsManager.cpp
+++ b/extensions/assets-manager/AssetsManager.cpp
@@ -253,7 +253,7 @@ void AssetsManager::downloadAndUncompress()
 void AssetsManager::update()
 {
     // all operation in checkUpdate, nothing need to do
-    // keep this function for compatiblity
+    // keep this function for compatibility
 }
 
 bool AssetsManager::uncompress()
@@ -308,8 +308,8 @@ bool AssetsManager::uncompress()
         const size_t filenameLength = strlen(fileName);
         if (fileName[filenameLength-1] == '/')
         {
-            // Entry is a direcotry, so create it.
-            // If the directory exists, it will failed scilently.
+            // Entry is a directory, so create it.
+            // If the directory exists, it will failed silently.
             if (!FileUtils::getInstance()->createDirectory(fullPath))
             {
                 CCLOG("can not create directory %s", fullPath.c_str());
diff --git a/extensions/assets-manager/AssetsManager.h b/extensions/assets-manager/AssetsManager.h
index 23d55ac7ce..f3452650b2 100644
--- a/extensions/assets-manager/AssetsManager.h
+++ b/extensions/assets-manager/AssetsManager.h
@@ -55,7 +55,7 @@ public:
         // Error caused by creating a file to store downloaded data
         CREATE_FILE,
         /** Error caused by network
-         -- network unavaivable
+         -- network unavailable
          -- timeout
          -- ...
          */
diff --git a/extensions/assets-manager/AssetsManagerEx.cpp b/extensions/assets-manager/AssetsManagerEx.cpp
index 58e8e82ae1..936dcf0b96 100644
--- a/extensions/assets-manager/AssetsManagerEx.cpp
+++ b/extensions/assets-manager/AssetsManagerEx.cpp
@@ -833,7 +833,7 @@ void AssetsManagerEx::onError(const network::DownloadTask& task,
                               int errorCodeInternal,
                               const std::string& errorStr)
 {
-    // Skip version error occured
+    // Skip version error occurred
     if (task.identifier == VERSION_ID)
     {
         CCLOG("AssetsManagerEx : Fail to download version file, step skipped\n");
diff --git a/extensions/assets-manager/AssetsManagerEx.h b/extensions/assets-manager/AssetsManagerEx.h
index 1fd166d26b..4dbfec62fc 100644
--- a/extensions/assets-manager/AssetsManagerEx.h
+++ b/extensions/assets-manager/AssetsManagerEx.h
@@ -149,7 +149,7 @@ protected:
      */
     const DownloadUnits& getFailedAssets() const;
     
-    /** @brief Function for destorying the downloaded version file and manifest file
+    /** @brief Function for destroying the downloaded version file and manifest file
      */
     void destroyDownloadedVersion();