The Final Chapter: The Day in the Life - S12-E11
Revealing mistake: Aubrey takes a tablet of some kind. However if you watch closely you will see he drops it in his mug instead of in his mouth.
The Final Chapter: The Day in the Life - S12-E11
Continuity mistake: In Brennan's segment of the episode, the cake on Angela's fork disappears after Brennan points out that saying Booth's aura is "as clean as it's ever been" was sarcasm.
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.