Really. I understand why Blizzard might have assumed that LFR wasn't language-dependent, but I'd hazard a guess that at this point it's pretty clear that language (and a very different gaming culture) is a problem when it comes to raids.
I've had it with waiting in a 40 minute queue only to be stuck with a raid where almost half of the players not only can't communicate with the others, but they're incredibly incompetent/childish as well. No straw-men please, we all know there's going to be bad players from every group, but there's a reason that Brazilian realms have a very poor reputation.
The fact is that integrating Brazilian and North American realms into the same LFR group has resulted in a much worse gaming experience for the North American players who participate in LFR/LFD. You can hide behind political correctness, you can say it's not a problem- but you're not going to fool the players who actually queue and who have to deal with this bullshit if they want to do LFR. And please don't tell us the zones have to stay integrated because of better queue times. I'd rather be in queue for an extra 30 minutes than chance doing LFR with a Brazilian player ever again. Yes, I'm that tired of it.
I really would like to know who I need to communicate with to make this complaint heard by someone who matters. I've been playing for seven years and I very rarely post on the official forums, but I've had it with this crap. Blizzard CSR and devs seem to blow off this issue entirely. The thing is, it's not an unsolvable problem. Separate the Brazilian and NA servers in LFR. I understand it may make for a poorer gaming experience for the Brazilian realms, but they're dragging down everyone else's experience in the meantime.
(And no, this is not racist; "Brazilian" is not a race. This is not a racial issue, it's a language and culture issue. It's not racist to say that most people from Florida suck at driving in the snow, or that most LFR players from Brazil are really, really shitty people to play with.)
Edit: as an aside, I posted this on the official forums and it was deleted quickly. Which brings me back to: how do we push for a solution to this?