It's a little unfair of Blizz to put everyone in a situation where the game is designed to work around good communication and cooperation in a group, while not giving us much in the way of tools we can use to communicate. If you post this on the official forums, all you will get is "working as intended" or suggestions involving using the emote system and/or keeping a list of common Portuguese wow-related phrases handy. It's true you can /point link [Righteous Fury] /no... but no one is going to stop and wait for you to try to get your point across that way.
I have no problems running with new players or inexperienced tanks, but helping someone requires the ability to communicate... the lack of it being completely Blizzard's fault, not the players. There will always be asshats that queue, nationality has nothing to do with it.
However, if I get another fully PVP'd out DK with no gems or enchants, I might scream just a little.