The Girl with the Curl - S2-E7
Trivia: The pageant where the girl was kidnapped from was taking place at the Hyperion Hotel. That was the same name of the hotel in the show Angel, David Boreanaz's previous show.
Trivia: The position of the bodies and in particular the arms of the two dead, corrupt FBI agents bear a remarkable resemblance to a full size painting that appears in Angela's throughout the first season and most of the second season of Bones - body upright, upper arms outstretched and forearms pointing down at a right angles.
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.