Living in Europe and playing WoW has one major perk over the US, thousands of players from a dozen countries get to play together. Of course we have realms specifically for people who speak Russian or French or English but it's quite common to find people who don't speak one of the major EU tongues on an English realm. For example, my guild's Assistant GM is French and he effectively learnt English by playing WoW.
When I joined my current guild I suddenly found out about this hidden multi-cultural and multi-lingual side to the game and as a result three of my best in-game friends are from Norway, Russia and the Netherlands. All have fantastic English skills but it's still common for them to go back to their native languages in group chat or over voice. They know I can't understand them but that doesn't stop me being able to guess what they're saying. Indeed the language barrier exists but it doesn't hamper the game one bit.
So I wonder, readers, do you regularly play with people from around the world? Have you learnt another language or improved your linguistic skills using the game? Do you play on a realm which doesn't speak your mother tongue? Do you enjoy playing with people from other cultures and countries? Has it inspired you to take up learning a second or third language?