The Girl in the Gator - S2-E13
Visible crew/equipment: At the start, the ice cream van stops and Booth shoots the clown. If you look at the road there is an orange tape marker visible where the van stops. (00:02:15)
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
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)
The Glowing Bones in the Old Stone House - S2-E20
Visible crew/equipment: At the start as Bones says about how Angela turned Hodgins down, there is a clear shot of Bones' top and a microphone visible just inside it. (00:01:00)
The Glowing Bones in the Old Stone House - S2-E20
Visible crew/equipment: When Booth is in the kitchen at Carly's talking to the husband who is going over the books of the restaurant, a tape marker is visible. (00:18:30)
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.