Continuity mistake: When Booth is sleeping at the very start his head changes place on his hands. (00:00:40)
Continuity mistake: When Booth is freaking out about a cup of coffee while stood in the middle of the roundabout, 2 cars pass him. Camera cuts and the second car is going past again. (00:15:20)
Continuity mistake: When the British police woman is saying what jurisdiction Booth will have, his shirt lapel goes from unobstructed to folded over. (00:05:30)
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.