Continuity mistake: Bone states that she will never have to fly coach When she does, she keeps her mouth slightly open. When the camera changes, her mouth is closed. (00:17:00)
Continuity mistake: The amount of grime on the CIA badge changes between the long and close-ups. (00:13:40)
Answer: Since the palatine bone is a bone that helps form the mouth it has a lot to do with speaking. The shape of it differs a lot depending on your ethnic background. I would guess that they, in the show, meant that the person's bone tells that they were Japanese and that it was "made for the purpose of speaking Japanese." That's what I'd assume anyway. I've studied molecular biology though, so I'm not an expert on bones.