Russian packages of CoD games are usually language-locked, meaning that you won’t be able to easily change the language of the game through Steam. Your options are the following:
- Purchase the game from the Steam store and don’t redeem keys nor buy accounts that have the game without ensuring they’re not language-locked.
- Find online a language patch of the language you’re interested in playing on and manually install it. You will not get help here for finding nor installing such patches.