The Russian version of FM11 was locked to Russian language only after the game was leaked from a Russian source last year.
People who downloaded the crack had to use a pack to convert from Russian to English. All subsequent patches were seperated, with one patch for Russian versions of the game, and one for other languages. There was no longer a way to change the language on the Russina version, even on legal versions of the game.
I imagine FM12 has been locked to russian only to prevent similar problems.