We probably would never make a non-English speaking player race. I know it seems attractive, but simply put, hearing alien for way too long drives you crazy. An early build of the game had Tython populated by a race other than Twi'leks, and after about the fourth quest, you want to put a fist through your monitor.
So any races we add in the future will need to plausibly be able to speak basic.
I agree with this. I'd counter with the fact that in many EU sources almost any race can learn galactic basic. Not every member of a species mind you, but the point of the game is you're playing a unique individual destined to do great things. It is plausible for many races that have been in the top running on almost all polls here on the forums to speak basic. Probably the bigger problem is the race size/shape rather than a can they talk like everyone else issue.