Sweet, Thank you all very much!

Hey guys, I have a US Account and play on a US server. I saw that i am also able to play on EU servers. My buddy's in Germany are thinking about getting SWTOR, and im not sure if the EU servers i am able to play on, are also the EU servers they get to pick from. So if they buy the Game in Germany, will we be able to play together, even though i have a US Copy and Account of the game?