The Critic in the Cabernet - S4-E25
Factual error: Temperance Brennan is examining the bones of the victim and mentions she wants to have a baby. She starts examining the tibia, mentions the she wants to have a baby, then says "capitulum" while still looking at the tibia. In actuality, the capitulum is on the distal epiphysis of the humerus, not the tibia. (00:06:25)
The Critic in the Cabernet - S4-E25
Continuity mistake: When interviewing the suspect over fake wine, Booth picks up the bottle. Camera changes and the bottle is back on the table. (00:34:40)
The Critic in the Cabernet - S4-E25
Continuity mistake: Hodgins and Fisher are discussing how hard it is to remove wine stain. Hodgins' rubber gloves are very dirty. When Fisher realizes how to clean the bones, Hodgins' gloves are much cleaner, only stained around the finger tips.
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.