Riley-ism

Tonight over dinner I wanted to tell Reed something about Riley but I didn't want Riley to understand me so I spoke in pig Latin. Riley, who has had a fascination with other languages lately said: Mom! What language was that? Like Japanese or Chinese or what?
Me: well... It's a form of Latin.
Reed: (snorts)
Riley: (in all seriousness) Mom. The devil speaks Latin.
Me: what the huh?

Later... He was relaying a story about if the three bears broke into our house and they weren't nice like in the story he would use his superior Kung-Fu skills to get them out of our house.
Riley: but I wouldn't want to kill them because then I'd go to jubi.
Me: where?
Riley: jubi.
Me: (thinking I'm hearing a b instead of a v) where?
Riley: Jubi. It's a prison for kids.
Me: how's it spelled?
Riley: j-u-a-b
Me: (trying to keep in the laughter) well... Juab is sort of LIKE a prison.
Riley: there might be an E at the end.

Where does he come up with this stuff?