This is a frequent issue on PC when files are incomplete or corrupt.
If you bought the game from a foreign store (e.g., the Polish PlayStation Store), it may strictly only support Russian/Polish audio and text.
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Steam is the primary platform for PC users, and it provides the easiest method for changing language packs. Step-by-Step Steam Method Right-click on Call of Duty: Advanced Warfare . Select "Properties". Navigate to the Language tab. Select "English" from the dropdown menu.
Highlight Call of Duty: Advanced Warfare on your dashboard, press the button, and select Check for Update .