Why is this game so popular in Russia/east europe?

I play in Europe servers in every game because, well... i live there, but usually 99.6% of the players i see speak english or have at the very least a name that's written in the Latin alphabet, regardless of the game being played. DBD is the only game i've ever played where roughly 50% of the matches have people with Cyrillic names and never speak a single english word.

I know Russia is kinda controversial due to politics and their reputation for hackers, but this question isn't related to that. Just genuine curiosity.

It is kinda annoying because after a match they'll just speak to you in their own language so i never know what they're saying. Whenever i translate it out of curiosity it's usually just a insult though.