The Hole in the Heart - S6-E22
Continuity mistake: In the diner at the start, when Bones is saying how it is personal, Booth has his hand up on his chin in the background. When the shot changes, his arm is lowered. (00:01:44)
The Hole in the Heart - S6-E22
Continuity mistake: In the port scene, just as Broadsky is getting ready to shoot Booth for the first time, Booth is constantly swapping from behind a blue container to a red container and is multiple times running to a blue container. However, there is only one blue container. (00:35:30)
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.