The Plain in the Prodigy - S5-E3
Continuity mistake: When finding out that the key cover broke Levi's hand, Bones is holding a bone in her hands and examining it. When the shot changes she isn't holding the bone any more. (00:34:30)
The Plain in the Prodigy - S5-E3
Continuity mistake: When Sweets comes to look at the rocks he puts his gloves on. Camera changes, and he's putting his second glove on a second time. (00:15:20)
The Plain in the Prodigy - S5-E3
Continuity mistake: The girl says that she saw a "full on Amish guy" who looked pissed. When she says this to Booth, he hand disappears from her chin instantly. (00:24:40)
The Plain in the Prodigy - S5-E3
Continuity mistake: Near the start, Cam is carrying sunglasses in her hand; suddenly they are on her face. (00:03:20)
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.