Yeah, I think this game absolutely needs a language preference. It boggles my mind that I queue on US servers, which one would assume is the fucking english speaking one...
Oh yeah? Why?
That's always the problem with these arguments and why they are always pretty funny, with americans whining as if US servers are somehow exclusive to the language instead of a region and complaining about some apparent lack of communication when really playing in pub games doesn't require that much complex coordination outside basic commands like those provided by Dota's quick chat wheel (the one you get when you press Y ingame.)
All in all this is just xenophobic posturing cause if you wanted some grand strategy bullshit you would be playing with friends anyway.