We've been asked several times to provide translated options for Cipheur, but we decided against it, since many things (like uncommon words) simply can't be translated reasonably while others (like video game quotes) would have "official" translations to other languages the game fans would expect and we might not know.
However, we decided to provide an alternative and we will be introducing some language packs to Cipheur. Today we are adding 3 Russian DLCs to the game, and the French ones are currently in development.
https://store.steampowered.com/app/3650880/Cipheur__CZitaty_iz_sovetskix_kinofilmov_1/?curator_clanid=45465938