I always think something like that when I read NA players about having problems playing with BR.
Language barrier in EU is real, most Russians don't understand a word of English, I once was in a M+ where a Greek guy explained to his friend what's going on, in a run with 4 Portuguese who where talking the whole fucking time didn't even sound like they're taking a breath (ingame voice chat is surprisingly good btw).
It doesn't matter, we get along for half an hour, last toxic run I was in was at least half a year ago.