Probably it is Ost troops.Im sure it's historical mistake or simplification what they all speak russian, even half of them is to much.However looks like it's not bug and game works as it was planned.Thanks for your answer.

<t> In version 5.50.07 some times battle begins with germans speaking russian (voice from "cross of iron"). Did not tried other versions. Is it bug or game/patch installed bad, and re-install will help? Also found in game folder in DATA\BASE\nations.txt line something like "1 ru" wich tells what ...