How to return the RUSSIAN Language to the game Battlefield 3 ANSWER

1) Install the game in English. Also, do not forget that you must update PunkBuster in the game to the latest version!
2) Then launch the GAME through EA to activate. IT IS MANDATORY TO LAUNCH ANY map on the server.
3) CLOSE the game and EA app, follow this link - Youtube 

4) Extract the files to the Downloads folder, then look for the disk where this game is installed.
5) Delete all files in the folder ...\...\Battlefield 3\Data\Win32\Loc
6) Copy documents from the archive from the DATA folder to the following folder ...\... \Battlefield 3\Data\Win32\Loc
7) Delete all files in the folder ...\...\Battlefield 3\Update\Patch\Data\Win32\Loc
8) Copy documents from the archive from the Update folder to the following folder ...\... \Battlefield 3\Update\Patch\Data\Win32\Loc
9) Copy the file GDFBinary_ru_RU from the archive to the following root folder of the game ...\... \Battlefield 3\ (it is not necessary to delete GDFBinary_en_US.dll)
10) Launch the EA app, launch the Battlefield 3 game and server. After starting the game and the server, in the Game Options, check on the Sound tab that the language is Russian.
11) WE REJOICE the game will be entirely in Russian, both TEXT and SOUND!

12) We do NOT make ANY CHANGES IN THE REGISTRY, otherwise the EA app will perceive this as interference and the game will NOT start!