Character mistake: Episode 5.07, "Dwarf in the Dirt" - Over lunch with Doctor/Chef Gordon Wyatt, Angela says he'd have to dislocate his jaw like "an articulated python" in order to bite into his sandwich. The snake is actually called a reticulated python.
Continuity mistake: When realising that the victim wanted "an averaged sized woman", Booth has a folder by his mouth. Camera cuts and it's gone. (00:34:40)
Visible crew/equipment: When Booth is being shown around the gold shop a black tape marker is visible by the door where Booth stops. (00:26:00)
Continuity mistake: When Bones is examining the ring, the position of the ring and her fingers is constantly changing. (00:37:05)
Continuity mistake: When Novarro, Booth and Bones are looking at the drain, there are a few marks on the floor by Booth's feet. In the close up these marks have disappeared. (00:27:00)
Continuity mistake: When Angela tells Gordon about the python, Gordon has the sandwich up to his mouth in one shot and lowered in the next. (00:23:40)
Continuity mistake: When Angela is in the diner with Gordon, she has her drink in her hand. When the shot changes, her glass is on the table. (00:23:40)
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.