The Boneless Bride in the River - S2-E16
Visible crew/equipment: Bones asks Sully if he can afford the boat, and he turns to look around the boat. When he does a mic pack is visible attached to his belt. (00:05:10)
The Boneless Bride in the River - S2-E16
Visible crew/equipment: When examining the hip bone for the 1st time, behind Booth on the floor is a black tape marker level with the ladder. (00:19:50)
The Boneless Bride in the River - S2-E16
Continuity mistake: Zack identifies the bone as belonging to a male who died 2 years ago of cancer. Booth, when questioning the parents say's it was 3 years ago they buried their son and the parents agree. (00:25:00)
The Boneless Bride in the River - S2-E16
Visible crew/equipment: When talking to the directors of the funeral home, Booth stands up from his desk and walks behind the 2 people. As he does so, a blue tape marker is visible on the floor by Booth's desk. (00:29:50)
The Boneless Bride in the River - S2-E16
Visible crew/equipment: When we first see both sets of remains on the table at the Jeffersonian, Angela walks up to the tables and a tape marker is visible on the floor by her feet. (00:31:40)
The Boneless Bride in the River - S2-E16
Visible crew/equipment: As we see Sully sail off into the sunset on his own, a hand and head can be seen on the boat with him despite a key point being he is on his own. (00:40:40)
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.