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Due to the voice acting present, there could never be a new race that could not speak Basic. Sorry, Wookiee fans, but despite the fact that Wookiees were playable in Star Wars: Galaxies and the Smuggler gets one as a companion, they'd have to rewire all of the voice acting to accommodate them in SWTOR. Same with folks wanting to play Trandoshans in homage to Qyzen Fess, or those of us crazy souls who think it would be pretty awesome (if a liiiiiiiittle bit lore-breaking) to run around as a Jawa Jedi Knight.
Read more of Jean Prior's Star Wars: The Old Republic: A New Playable Race in SWTOR?