DF has added one big new word: Noooooooo . . . !
The tone is more playful than negative. And he really doesn't have a feel for what it means. For instance, he uses it when he actually does want bread. It is awfully fun.
I don't know if I've mentioned it but he also is very generous with 'Hi!' when confronting strangers. Just like his sister. They are quite the tandem.