So, dungeon queues and LFR are getting very long to join, especially on lvling, and it will get worse when paid boost to 90 will be out.
Since almost everyone is able to speak enough of english to communicate in a 5 man/LFR (Which is rarely necessary anyway), why don't Blizzard allow us to enter a dungeon/LFR with peoples from other countries ?
Some games such as League of Legends shown us that language is no longer a barrier.
It would drastically shorten the queues, especially for european servers.