Continuity mistake: When Bones and Angela are talking about her leaving, Bones has a lock of hair that is loose and hanging down. Camera cuts and it's gone. (00:16:35)
Continuity mistake: When Bones and Booth are discussing baby animals, Zac has one hand on his folder. Camera cuts to Zac and he has got 2 hands on his folder. (00:18:00)
Continuity mistake: When Booth is showing off his scar to the kid, the picture on the table is constantly changing position between shots. (00:26:10)
Continuity mistake: When the mummy is discovered in the wall the mouth is closed shut. When the mummy is in the lab the mouth is open. (00:04:30)
Continuity mistake: At the start Hodgins passes Bones a folder. Bones' grip on, and the position of said folder changes instantly. (00:05:50)
Continuity mistake: When Booth is showing the belly button ring to Rulz, he holds the bag with the ring on the right side of the bag. Camera cuts and now it's on the left. (00:17:20)
Continuity mistake: When interviewing Rulz, Bones looks at his wrist. In the closeup he is holding a vinyl. Camera changes to show all of Rulz and his hands are now on his knees. (00:17:50)
Continuity mistake: We see Bones draw a chalk outline on the floor and it is fairly faint. When we next see it, the lines are a lot more refined. (00:30:30)
Continuity mistake: When interviewing Rulz, his jacket is open with the left (screen right) lapel over the of the right (screen left) lapel. During the interview they keep swapping places. (00:33:20)
Continuity mistake: When Booth is interviewing The Man in the Wall, he is stood to the side of the door. Camera changes and now he is in the middle of the door. (00:33:50)
The Girl in the Fridge - S1-E8
Continuity mistake: When Bones and Michael are in bed, Michael has his hands clasped over his chest. Camera cuts and they are by his side. (00:06:20)
The Girl in the Fridge - S1-E8
Continuity mistake: When Zac and Hodgins turn to face Michael, the distance between them keeps altering drastically. (00:08:40)
The Girl in the Fridge - S1-E8
Continuity mistake: When talking to the doctor, he has a pen on the notes in front of him. When the scene ends, the pen has gone. (00:13:05)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: At the very start we have a message appear on screen saying it's December 23rd, 6pm. When we see Hodgins and Zack the clock shows 4:30. (00:00:25 - 00:02:40)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: Bones puts the skull down on the table facing to the left. Camera cuts and the skull is facing to the right. (00:00:45)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: At the start Bones puts a tray down next to the skull and lifts her hand away from the tray as the camera changes. In the new angle, she is placing the tray down again. (00:01:00)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: Goodman passes a picture of his family to Booth. In the close up we see Booth holding the photo with 2 hands. In the long shot he is holding it with one. (00:11:00)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: Booth sits down with bones and takes Angela's hat off. It's still in his hand in one shot and gone the next. (00:12:50)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: When Bones is explaining to Booth about the birth of Christ, Booth has 2 hands on his chin. When the angle changes, he has one hand on the table and one on the side of his head. (00:13:00)
The Man in the Fallout Shelter - S1-E9
Continuity mistake: When Booth calls Bones the Christmas Killer, he flips a photo over only for it to be back the way it was in the next shot without anyone touching it. (00:14:00)
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.