If you own the game legally on PC, you do not need to download shady third-party packs. The language files are likely already on your hard drive; they are just locked.
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. call of duty advanced warfare language pack english
Using mismatching language files can cause "Data is incompatible" errors if the game has been updated. If you own the game legally on PC,