Delete the players folder inside your MW3 directory. Launch the game. The config will regenerate with English as the primary.
If the automatic update fails or you are using a version from a different region, you must manually replace the localized files in the game directory: call of duty modern warfare 3 2011 english language pack new
If your version supports multiple languages, Steam can download the necessary files automatically: Steam Library and right-click on Call of Duty: Modern Warfare 3 (2011) Properties from the dropdown menu. Steam will download an update (approximately for full audio and text). Method 2: Manual English Language Pack Installation Delete the players folder inside your MW3 directory






