The Method in the Madness - S8-E5
Continuity mistake: At the start, Bones is putting her one glove on. Camera changes and both gloves are now on. (00:03:15)
The Method in the Madness - S8-E5
Continuity mistake: When Bones starts to explain about the Aztecs, Hodgins is holding a boot upright. Camera changes and the boot is now upside down. (00:06:40)
The Method in the Madness - S8-E5
Continuity mistake: When Sweets is staying at Booth's and Brennan's house, he comes downstairs after taking a bath and, as he turns, his shoulders are shown without the scars he has in another episode.
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.