Right-click Far Cry 3 > Properties > Local Files > Verify Integrity of Game Files.
Which are you using (Steam, Ubisoft Connect, or GOG)?
If they are named something like sound_french.dat , the game is trying to load English audio that isn't installed. You can try renaming your existing language files to sound_english , though this may cause crashes if the file sizes don't match. 3. The "Exclusive" Error Fix