Visible crew/equipment: When we see the aerial shots at the end, the shadow from the filming helicopter can be seen on the ground. (00:39:55)
Visible crew/equipment: At the end we see an aerial shot of the area by the Washington Monument and the shadow of the filming helicopter can be seen on the ground. (00:42:30)
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.