Should we ever encounter another race, how the hell will we communicate? Not every creature speaks English as all those sci-fi shows would want you to believe. Ever tried to speak with a polar bear?
Should we encounter them it will most likely be boom boom pew pew, if you ask me. Either they do something to offend us or we them, unless some one invents that <strike>poor excuse so they don't have to add different languages</strike> little device thingy they have in Star trek.
Still though, if there are others out here, chances are they'll be preeeetty far away. I mean, look at life on Earth. That's the result of a couple of events that had perhaps one in a million chance of happening. I doubt the exact same events would happen in say, Alpha Centauri.