diff --git a/misc04_building_your_own_app/playground2.cpp b/misc04_building_your_own_app/playground2.cpp
index 074f2b700..d0b811c6d 100644
--- a/misc04_building_your_own_app/playground2.cpp
+++ b/misc04_building_your_own_app/playground2.cpp
@@ -21,7 +21,7 @@ int main( void )
 #endif
 
 
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
diff --git a/misc05_picking/misc05_picking_BulletPhysics.cpp b/misc05_picking/misc05_picking_BulletPhysics.cpp
index 9da5e8c44..c362b6e56 100644
--- a/misc05_picking/misc05_picking_BulletPhysics.cpp
+++ b/misc05_picking/misc05_picking_BulletPhysics.cpp
@@ -86,7 +86,7 @@ void ScreenPosToWorldRay(
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -135,7 +135,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/misc05_picking/misc05_picking_custom.cpp b/misc05_picking/misc05_picking_custom.cpp
index 7f21b3f1a..0b414aa7e 100644
--- a/misc05_picking/misc05_picking_custom.cpp
+++ b/misc05_picking/misc05_picking_custom.cpp
@@ -198,7 +198,7 @@ bool TestRayOBBIntersection(
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -209,7 +209,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -248,7 +248,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/misc05_picking/misc05_picking_slow_easy.cpp b/misc05_picking/misc05_picking_slow_easy.cpp
index f538df318..396be2e17 100644
--- a/misc05_picking/misc05_picking_slow_easy.cpp
+++ b/misc05_picking/misc05_picking_slow_easy.cpp
@@ -29,7 +29,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -40,7 +40,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -79,7 +79,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/playground/playground.cpp b/playground/playground.cpp
index 2835616a1..05d1da25c 100644
--- a/playground/playground.cpp
+++ b/playground/playground.cpp
@@ -11,7 +11,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -23,7 +23,7 @@ int main( void )
 	glfwWindowHint(GLFW_RESIZABLE,GL_FALSE);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
diff --git a/tutorial01_first_window/tutorial01.cpp b/tutorial01_first_window/tutorial01.cpp
index fcf09245e..2fd5493da 100644
--- a/tutorial01_first_window/tutorial01.cpp
+++ b/tutorial01_first_window/tutorial01.cpp
@@ -15,7 +15,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -26,7 +26,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
diff --git a/tutorial02_red_triangle/tutorial02.cpp b/tutorial02_red_triangle/tutorial02.cpp
index d9db11e4c..fb9e90ce5 100644
--- a/tutorial02_red_triangle/tutorial02.cpp
+++ b/tutorial02_red_triangle/tutorial02.cpp
@@ -17,7 +17,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -28,7 +28,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
diff --git a/tutorial03_matrices/tutorial03.cpp b/tutorial03_matrices/tutorial03.cpp
index f92294b36..316994344 100644
--- a/tutorial03_matrices/tutorial03.cpp
+++ b/tutorial03_matrices/tutorial03.cpp
@@ -18,7 +18,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -29,7 +29,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); //We don't want the old OpenGL 
 
 	// Open a window and create its OpenGL context
@@ -67,7 +67,7 @@ int main( void )
 	// Get a handle for our "MVP" uniform
 	GLuint MatrixID = glGetUniformLocation(programID, "MVP");
 
-	// Projection matrix : 45° Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
+	// Projection matrix : 45� Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
 	glm::mat4 Projection = glm::perspective(glm::radians(45.0f), 4.0f / 3.0f, 0.1f, 100.0f);
 	// Or, for an ortho camera :
 	//glm::mat4 Projection = glm::ortho(-10.0f,10.0f,-10.0f,10.0f,0.0f,100.0f); // In world coordinates
diff --git a/tutorial04_colored_cube/tutorial04.cpp b/tutorial04_colored_cube/tutorial04.cpp
index 2587ed2d4..bc4338d3a 100644
--- a/tutorial04_colored_cube/tutorial04.cpp
+++ b/tutorial04_colored_cube/tutorial04.cpp
@@ -18,7 +18,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -29,7 +29,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -59,7 +59,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	GLuint VertexArrayID;
@@ -72,7 +72,7 @@ int main( void )
 	// Get a handle for our "MVP" uniform
 	GLuint MatrixID = glGetUniformLocation(programID, "MVP");
 
-	// Projection matrix : 45° Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
+	// Projection matrix : 45� Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
 	glm::mat4 Projection = glm::perspective(glm::radians(45.0f), 4.0f / 3.0f, 0.1f, 100.0f);
 	// Camera matrix
 	glm::mat4 View       = glm::lookAt(
diff --git a/tutorial05_textured_cube/tutorial05.cpp b/tutorial05_textured_cube/tutorial05.cpp
index 15f3a0193..f33a73acd 100644
--- a/tutorial05_textured_cube/tutorial05.cpp
+++ b/tutorial05_textured_cube/tutorial05.cpp
@@ -19,7 +19,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -29,7 +29,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -56,7 +56,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	GLuint VertexArrayID;
@@ -69,7 +69,7 @@ int main( void )
 	// Get a handle for our "MVP" uniform
 	GLuint MatrixID = glGetUniformLocation(programID, "MVP");
 
-	// Projection matrix : 45° Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
+	// Projection matrix : 45� Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
 	glm::mat4 Projection = glm::perspective(glm::radians(45.0f), 4.0f / 3.0f, 0.1f, 100.0f);
 	// Camera matrix
 	glm::mat4 View       = glm::lookAt(
diff --git a/tutorial06_keyboard_and_mouse/tutorial06.cpp b/tutorial06_keyboard_and_mouse/tutorial06.cpp
index 0c4646656..c97af498a 100644
--- a/tutorial06_keyboard_and_mouse/tutorial06.cpp
+++ b/tutorial06_keyboard_and_mouse/tutorial06.cpp
@@ -20,7 +20,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -31,7 +31,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -55,7 +55,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -67,7 +67,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial07_model_loading/tutorial07.cpp b/tutorial07_model_loading/tutorial07.cpp
index f284e6438..c9a226032 100644
--- a/tutorial07_model_loading/tutorial07.cpp
+++ b/tutorial07_model_loading/tutorial07.cpp
@@ -22,7 +22,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -33,7 +33,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -57,7 +57,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -69,7 +69,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial08_basic_shading/tutorial08.cpp b/tutorial08_basic_shading/tutorial08.cpp
index 7a9eda0cf..5c5043969 100644
--- a/tutorial08_basic_shading/tutorial08.cpp
+++ b/tutorial08_basic_shading/tutorial08.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -58,7 +58,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -70,7 +70,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial09_vbo_indexing/tutorial09.cpp b/tutorial09_vbo_indexing/tutorial09.cpp
index 7838cee31..3ff5e2f2c 100644
--- a/tutorial09_vbo_indexing/tutorial09.cpp
+++ b/tutorial09_vbo_indexing/tutorial09.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -58,7 +58,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -70,7 +70,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial09_vbo_indexing/tutorial09_AssImp.cpp b/tutorial09_vbo_indexing/tutorial09_AssImp.cpp
index 83a5358f2..e18531b2c 100644
--- a/tutorial09_vbo_indexing/tutorial09_AssImp.cpp
+++ b/tutorial09_vbo_indexing/tutorial09_AssImp.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -58,7 +58,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -70,7 +70,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial09_vbo_indexing/tutorial09_several_objects.cpp b/tutorial09_vbo_indexing/tutorial09_several_objects.cpp
index 260958d97..5b5283228 100644
--- a/tutorial09_vbo_indexing/tutorial09_several_objects.cpp
+++ b/tutorial09_vbo_indexing/tutorial09_several_objects.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -58,7 +58,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -70,7 +70,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial10_transparency/tutorial10.cpp b/tutorial10_transparency/tutorial10.cpp
index 078696b72..118867c54 100644
--- a/tutorial10_transparency/tutorial10.cpp
+++ b/tutorial10_transparency/tutorial10.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -58,7 +58,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
     glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -70,7 +70,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
@@ -146,7 +146,7 @@ int main( void )
 		// Measure speed
 		double currentTime = glfwGetTime();
 		nbFrames++;
-		if ( currentTime - lastTime >= 1.0 ){ // If last prinf() was more than 1sec ago
+		if ( currentTime - lastTime >= 1.0 ){ // If last printf() was more than 1sec ago
 			// printf and reset
 			printf("%f ms/frame\n", 1000.0/double(nbFrames));
 			nbFrames = 0;
diff --git a/tutorial11_2d_fonts/tutorial11.cpp b/tutorial11_2d_fonts/tutorial11.cpp
index 333b21db8..dc132522b 100644
--- a/tutorial11_2d_fonts/tutorial11.cpp
+++ b/tutorial11_2d_fonts/tutorial11.cpp
@@ -24,7 +24,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -35,7 +35,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -59,7 +59,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -71,7 +71,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial12_extensions/tutorial12.cpp b/tutorial12_extensions/tutorial12.cpp
index 3cfb1daed..917dfc88a 100644
--- a/tutorial12_extensions/tutorial12.cpp
+++ b/tutorial12_extensions/tutorial12.cpp
@@ -65,7 +65,7 @@ void APIENTRY DebugOutputCallback(GLenum source, GLenum type, GLuint id, GLenum
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -76,7 +76,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// ARB_debug_output is a bit special, 
@@ -126,7 +126,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -138,7 +138,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH); // SHOULD BE GL_DEPTH_TEST ! WILL TRIGGER AN ERROR MESSAGE !
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LEFT);  // SHOULD BE GL_LESS ! WILL TRIGGER AN ERROR MESSAGE !
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial13_normal_mapping/tutorial13.cpp b/tutorial13_normal_mapping/tutorial13.cpp
index 17304b010..63df4fd42 100644
--- a/tutorial13_normal_mapping/tutorial13.cpp
+++ b/tutorial13_normal_mapping/tutorial13.cpp
@@ -24,7 +24,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -35,7 +35,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 1);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 	//glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_COMPAT_PROFILE); // So that glBegin/glVertex/glEnd work
 
@@ -60,7 +60,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -72,7 +72,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial14_render_to_texture/tutorial14.cpp b/tutorial14_render_to_texture/tutorial14.cpp
index 6592a28eb..30f49f95d 100644
--- a/tutorial14_render_to_texture/tutorial14.cpp
+++ b/tutorial14_render_to_texture/tutorial14.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -64,7 +64,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -76,7 +76,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial15_lightmaps/tutorial15.cpp b/tutorial15_lightmaps/tutorial15.cpp
index 9a75155eb..9d9c0eff9 100644
--- a/tutorial15_lightmaps/tutorial15.cpp
+++ b/tutorial15_lightmaps/tutorial15.cpp
@@ -22,7 +22,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -33,7 +33,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -57,7 +57,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -69,7 +69,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial16_shadowmaps/tutorial16.cpp b/tutorial16_shadowmaps/tutorial16.cpp
index 223c3afc7..f8c7208b8 100644
--- a/tutorial16_shadowmaps/tutorial16.cpp
+++ b/tutorial16_shadowmaps/tutorial16.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -64,7 +64,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -77,7 +77,7 @@ int main( void )
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
 
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial16_shadowmaps/tutorial16_SimpleVersion.cpp b/tutorial16_shadowmaps/tutorial16_SimpleVersion.cpp
index bb46f1563..938e983e9 100644
--- a/tutorial16_shadowmaps/tutorial16_SimpleVersion.cpp
+++ b/tutorial16_shadowmaps/tutorial16_SimpleVersion.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -34,7 +34,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -64,7 +64,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -77,7 +77,7 @@ int main( void )
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
 
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
 
 	// Cull triangles which normal is not towards the camera
diff --git a/tutorial17_rotations/tutorial17.cpp b/tutorial17_rotations/tutorial17.cpp
index cc8cfe58c..530dcf602 100644
--- a/tutorial17_rotations/tutorial17.cpp
+++ b/tutorial17_rotations/tutorial17.cpp
@@ -42,7 +42,7 @@ bool gLookAtOther = true;
 int main( void )
 {
  
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -53,7 +53,7 @@ int main( void )
 	glfwWindowHint(GLFW_SAMPLES, 4);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
  
 	// Open a window and create its OpenGL context
@@ -103,7 +103,7 @@ int main( void )
  
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -115,7 +115,7 @@ int main( void )
  
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS); 
  
 	// Cull triangles which normal is not towards the camera
@@ -261,7 +261,7 @@ int main( void )
  
 		{ // Euler
  
-			// As an example, rotate arount the vertical axis at 180°/sec
+			// As an example, rotate arount the vertical axis at 180�/sec
 			gOrientation1.y += 3.14159f/2.0f * deltaTime;
  
 			// Build the model matrix
diff --git a/tutorial18_billboards_and_particles/tutorial18_billboards.cpp b/tutorial18_billboards_and_particles/tutorial18_billboards.cpp
index 99c503249..bac01c23d 100644
--- a/tutorial18_billboards_and_particles/tutorial18_billboards.cpp
+++ b/tutorial18_billboards_and_particles/tutorial18_billboards.cpp
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -35,7 +35,7 @@ int main( void )
 	glfwWindowHint(GLFW_RESIZABLE,GL_FALSE);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
@@ -59,7 +59,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -71,7 +71,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS);
 
 	GLuint VertexArrayID;
@@ -186,7 +186,7 @@ int main( void )
 		glUniform1i(TextureID, 0);
 
 		// This is the only interesting part of the tutorial.
-		// This is equivalent to mlutiplying (1,0,0) and (0,1,0) by inverse(ViewMatrix).
+		// This is equivalent to multiplying (1,0,0) and (0,1,0) by inverse(ViewMatrix).
 		// ViewMatrix is orthogonal (it was made this way), 
 		// so its inverse is also its transpose, 
 		// and transposing a matrix is "free" (inversing is slooow)
diff --git a/tutorial18_billboards_and_particles/tutorial18_billboards.cpp.bak b/tutorial18_billboards_and_particles/tutorial18_billboards.cpp.bak
index d140a3b12..fb266f279 100644
--- a/tutorial18_billboards_and_particles/tutorial18_billboards.cpp.bak
+++ b/tutorial18_billboards_and_particles/tutorial18_billboards.cpp.bak
@@ -23,7 +23,7 @@ using namespace glm;
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -63,7 +63,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS);
 
 	GLuint VertexArrayID;
@@ -178,7 +178,7 @@ int main( void )
 		glUniform1i(TextureID, 0);
 
 		// This is the only interesting part of the tutorial.
-		// This is equivalent to mlutiplying (1,0,0) and (0,1,0) by inverse(ViewMatrix).
+		// This is equivalent to multiplying (1,0,0) and (0,1,0) by inverse(ViewMatrix).
 		// ViewMatrix is orthogonal (it was made this way), 
 		// so its inverse is also its transpose, 
 		// and transposing a matrix is "free" (inversing is slooow)
diff --git a/tutorial18_billboards_and_particles/tutorial18_particles.cpp b/tutorial18_billboards_and_particles/tutorial18_particles.cpp
index 14a352291..d1919a938 100644
--- a/tutorial18_billboards_and_particles/tutorial18_particles.cpp
+++ b/tutorial18_billboards_and_particles/tutorial18_particles.cpp
@@ -64,7 +64,7 @@ void SortParticles(){
 
 int main( void )
 {
-	// Initialise GLFW
+	// Initialize GLFW
 	if( !glfwInit() )
 	{
 		fprintf( stderr, "Failed to initialize GLFW\n" );
@@ -76,11 +76,11 @@ int main( void )
 	glfwWindowHint(GLFW_RESIZABLE,GL_FALSE);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make macOS happy; should not be needed
 	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
 
 	// Open a window and create its OpenGL context
-	window = glfwCreateWindow( 1024, 768, "Tutorial 18 - Particules", NULL, NULL);
+	window = glfwCreateWindow( 1024, 768, "Tutorial 18 - Particles", NULL, NULL);
 	if( window == NULL ){
 		fprintf( stderr, "Failed to open GLFW window. If you have an Intel GPU, they are not 3.3 compatible. Try the 2.1 version of the tutorials.\n" );
 		getchar();
@@ -100,7 +100,7 @@ int main( void )
 
 	// Ensure we can capture the escape key being pressed below
 	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
-    // Hide the mouse and enable unlimited mouvement
+    // Hide the mouse and enable unlimited movement
     glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
     
     // Set the mouse at the center of the screen
@@ -112,7 +112,7 @@ int main( void )
 
 	// Enable depth test
 	glEnable(GL_DEPTH_TEST);
-	// Accept fragment if it closer to the camera than the former one
+	// Accept fragment if it is closer to the camera than the former one
 	glDepthFunc(GL_LESS);
 
 	GLuint VertexArrayID;
@@ -197,9 +197,9 @@ int main( void )
 		glm::mat4 ViewProjectionMatrix = ProjectionMatrix * ViewMatrix;
 
 
-		// Generate 10 new particule each millisecond,
+		// Generate 10 new particle each millisecond,
 		// but limit this to 16 ms (60 fps), or if you have 1 long frame (1sec),
-		// newparticles will be huge and the next frame even longer.
+		// new particles will be huge and the next frame even longer.
 		int newparticles = (int)(delta*10000.0);
 		if (newparticles > (int)(0.016f*10000.0))
 			newparticles = (int)(0.016f*10000.0);
@@ -277,16 +277,13 @@ int main( void )
 
 		SortParticles();
 
-
 		//printf("%d ",ParticlesCount);
 
-
 		// Update the buffers that OpenGL uses for rendering.
 		// There are much more sophisticated means to stream data from the CPU to the GPU, 
 		// but this is outside the scope of this tutorial.
 		// http://www.opengl.org/wiki/Buffer_Object_Streaming
 
-
 		glBindBuffer(GL_ARRAY_BUFFER, particles_position_buffer);
 		glBufferData(GL_ARRAY_BUFFER, MaxParticles * 4 * sizeof(GLfloat), NULL, GL_STREAM_DRAW); // Buffer orphaning, a common way to improve streaming perf. See above link for details.
 		glBufferSubData(GL_ARRAY_BUFFER, 0, ParticlesCount * sizeof(GLfloat) * 4, g_particule_position_size_data);
@@ -358,7 +355,7 @@ int main( void )
 		glVertexAttribDivisor(1, 1); // positions : one per quad (its center)                 -> 1
 		glVertexAttribDivisor(2, 1); // color : one per quad                                  -> 1
 
-		// Draw the particules !
+		// Draw the particles !
 		// This draws many times a small triangle_strip (which looks like a quad).
 		// This is equivalent to :
 		// for(i in ParticlesCount) : glDrawArrays(GL_TRIANGLE_STRIP, 0, 4),