We mostly just ignore it so she won't get a reaction unless she's really telling us no as an actual answer - like if we ask her a question that could be yes or no. I'm assuming that it will just go away on its own just like most of the other things. Fun though, isn't it!?
C told me to get out of her room yesterday morning "Go, mama, go." ...while she happily played in her crib. I was like "Ok, see ya!" lol