The Proof in the Pudding - S5-E12
Continuity mistake: At the end when Booth is hugging Brennan after the bone sinks, Brennan's hands go from being clenched to being open to being clenched again. (00:37:00)
The Proof in the Pudding - S5-E12
Continuity mistake: When Bones confirms the bones in the lab were not JFK's she has a coffee cup in her hand. When the shot changes she now has a fork in her hand. (00:38:08)
The Proof in the Pudding - S5-E12
Continuity mistake: When telling Hodgins about the pregnancy, Angela's arms are constantly changing position between camera angles. (00:19:25)
The Proof in the Pudding - S5-E12
Continuity mistake: When Booth is tackled upon entering the lab, his gun is shown to go flying along the floor towards the doors. When the shot changes, a guard who tackled Booth has the gun in his hand. (00:16:10)
The Proof in the Pudding - S5-E12
Continuity mistake: When Booth is talking to his boss at the diner, the latter is chewing on his mouth full of food when shot from the right, and has an empty mouth when shot from the left. This happens every time the shot changes angles. (00:11:30)
The Proof in the Pudding - S5-E12
Continuity mistake: At the end in the diner, Angela says about the body not being JFK, When she does Hodgins has his fork up by his mouth. Camera cuts and it's lowered. (00:38:20)
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.