If the download is huge (20GB+), Steam is re-downloading the whole game. Stop it. Verify your files first.

If your version is region-locked (e.g., a Russian or Polish retail copy), the language tab might not appear. In this case, you may need to manually swap files:

If you have a specific regional copy (like the Polish/Russian SKU), it may only contain those two languages. Users have reported that even changing the console region does not always unlock English if the assets aren't on the disc.

Locate your game folder (typically C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Advanced Warfare ).

If your version supports multiple languages, use the built-in Steam settings. If it is region-locked, you must use a manual workaround. Open your Steam Library . Right-click on Call of Duty: Advanced Warfare . Select Properties > Language .