There's no such thing as a Wookie Jedi.
Well, Rodians and Gammoreans are well-known for working under gangsters so they will undoubtably be present but I agree about incorporating other NPC races.
It's a Jedi skill, they acquire the speech from the person speaking by using the Force.
A training saber is a stun weapon used in the Jedi temple for Padawans to build up coordination. It would not do any real damage and thus would only be for show.
I like this idea but I think that, while they should begin lightsaber training by sparring with the PC using a non-lethal training saber, the quest should culminate in the NPC finding the parts and crystal necessary and assembling his or her own saber.
I think Jedi should be able to construct a saber whenever, as long as the have the crystal and parts - also, that this saber is uniquely usable by the Jedi who made it. This would tie in to the bond Jedi have with the force through their sabers.