The Spark in the Park - S9-E11
Continuity mistake: The box the dad draws around the questions at the end changes design. Note the long line on the right hand side. (00:44:50)
The Spark in the Park - S9-E11
Revealing mistake: When the burning leg lands on the witness at the start, the flames are super imposed. (00:01:55)
The Spark in the Park - S9-E11
Continuity mistake: At the end, the equations on the board are different in the close ups to the distance shots. (00:43:15)
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.