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Open your installation folder (typically C:\Games\Call of Duty - Modern Warfare III\ or inside your steamapps\common directory).
Click the next to the Play button and select Game Settings .
If your game is launching in a language you do not understand, you do not need to redownload the entire 100GB+ game. You only need to acquire the specific English localization asset pack through your platform's official client. How to Get the English Language Pack on PC call of duty modern warfare 3 english language pack link
Or for the specific Steam depot:
For players who had a mix of English and Russian files, an advanced hack involved going into the zone directory. You could copy all the files from the zone/russian folder into the zone/english folder. This trick would force the game to use the Russian audio/video files with the English text, often resolving the "Incompatible Data" error when joining multiplayer matches.
Select to prompt the console to download the files. Troubleshooting In-Game Audio and Text Issues This public link is valid for 7 days
For most users, you do not need a standalone link; the files are available via your platform's store or library settings. Close the game completely. Open your Steam Library and right-click on Call of Duty . Select Properties > Language . Choose English from the dropdown menu.
Once you've downloaded a language pack, follow these general installation instructions:
Below are the step-by-step instructions to get the English language pack on PC (Steam and Battle.net), PlayStation, and Xbox, along with common troubleshooting steps. Why Is Your Game Missing the English Language Pack? Can’t copy the link right now
Press the Xbox guide button and navigate to .
Click on the game tile again and select .