Continuity mistake: When Cam sits down with some catalogues for Michelle at the start, Michelle's hands change place between camera angles. In one shot, she has her left arm out straight, and in the next, she is fiddling with her right hand. (00:07:00)
The Shallow in the Deep - S6-E6
Continuity mistake: At the end, when in the diner, there is a very long shot of Daisey and Sweets, followed by a close-up. Their positions change between these angles. Most noticeably, Daisey's right arm. (00:39:20)
The Bones That Weren't - S6-E5
Continuity mistake: When Derek takes Booth's watch, he holds it up over his index finger to show Booth. When Booth grabs the watch, Derek is now holding it with his thumb and index finger. (00:18:40)
The Couple in the Cave - S6-E2
Continuity mistake: The photo of the victims that Sweets and Booth has out in the park goes from folded and rumpled to straight and neat between shots. (00:17:50)
The Couple in the Cave - S6-E2
Continuity mistake: When Sweets holds out the picture of the victims for Mr. Winkle to look at, his grip on the paper changes between shots. (00:18:00)
The Mastodon in the Room - S6-E1
Continuity mistake: When Hodgins and Angela are talking in the diner at the end, Hodgins' hand keeps moving when resting his head in it. (00:38:20)
The Mastodon in the Room - S6-E1
Continuity mistake: In the diner, when looking at the X-Ray with a glass, Dr. Brennan's grip on the glass changes. Note the lip. (00:25:30)
The Maggots in the Meathead - S6-E3
Continuity mistake: The two slivers that Fisher removes from the skull are placed under a microscope. However, the items move on the screen between the three different camera angles. (00:31:20)
The Couple in the Cave - S6-E2
Continuity mistake: At the end, when Booth and Hannah leave the bar, Booth puts some money on the bar to pay for his drink. When the shot shows Bones alone at the bar, and the shot is zooming out, the money on the bar has completely changed position from the previous shot. (00:40:50)
The Couple in the Cave - S6-E2
Continuity mistake: When Dr. Clark Edison apologizes for talking about Brennan and Booth "not getting all butt naked" together, Angela is standing near Cam, but when Hodgins tells Clark "dude, a little self control" Angela is now standing on the other side of the platform beside Clark. (00:06:40)
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.