
Harbingers in a Fountain - S5-E1
Visible crew/equipment: Booth puts his sunglasses on when Caroline goes to get the warrant. When he does so, a light screen and equipment is reflected in his glasses. (00:07:40)

The Beautiful Day in the Neighborhood - S5-E4
Visible crew/equipment: We can see crew reflected in Hodgins' car door as he arrives at the crime scene. (00:20:20)

Visible crew/equipment: When Booth is being shown around the gold shop a black tape marker is visible by the door where Booth stops. (00:26:00)

The Gamer in the Grease - S5-E9
Visible crew/equipment: When Booth and Bones first see the Autistic boy a pink T marker is visible on the floor.

The Dentist in the Ditch - S5-E13
Visible crew/equipment: When Bones and Booth start talking to the coach on the field a light screen is reflected in Bones' sunglasses. (00:19:50)

The Death of the Queen Bee - S5-E17
Visible crew/equipment: When Hodgins rushes to speak to Angela, a yellow marker is visible on the floor. (00:07:50)
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.