The Future in the Past - S8-E1
Visible crew/equipment: When Bones is on the platform and everyone has gone from the lab, Sweets arrives and we can see a woman walking behind him. There isn't supposed to be anyone at the Jeffersonian except them.
The Secret in the Siege - S8-E24
Visible crew/equipment: When the camera pans to behind Pelant's desk, the camera shadow can be seen on the desk. (00:00:50)
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.