Hello @vlntn1989 and thanks for reaching out to us.
I understand from your post that you would like to be able to use Russian as your language for the in-game interface, audio and subtitles.
As a quick question, can you please confirm whether it is a digital or physical copy of the game that you already own?
Once I know more about the edition of the game you own, and from which region, I'll be able to better advise you with regard to this query. It may be that the regional version of the game that you own is not one which includes the Russian languages, in which case you'll unfortunately not be able to select it in-game to use.
Thank you in advance for any further information that you provide, and please let me know if you need any additional assistance in the meantime!