All families develop their personal set of phrases. Our boys already have two.
The first is, sigh, repeating "Out of the kitchen! I'm cooking! Very dangerous!" exactly in English. Though occasionally Elisey will insist that something is not dangerous as part of his rebellion. Dimcho tends to just blunder ahead and we have to scoot him out of the kitchen.
The other is pointing to pictures or videos of TVs and exclaiming "Raboti*! (it works!)" This is because of our week in Sofia, we told them the TV didn't work ("ne raboti" in Bulgarian) and the computer didn't work (true, thanks to them). This was to minimize their messing with it. At home we also told them various electronic devices didn't work. So the boys, especially Elisey, routinely point out ads for TVs in the newspaper and tells us "Raboti!"
The boys also have a copy of a short video we made about Bulgaria, which they love to watch because it helps them remember their home at the orphanage. At one point the camera pans past a TV in the play room and Elisey always exclaims "Raboti!", reminding us that as bad as the orphanage was, it had working TV.
*For you etymologists, "rabot" is the general Slavic root for "work." This word passed into English through a 1920 Polish play by Karel Capek, "R.U.R." for "Rossum's Universal Robots," where mechanical men were slaves, which became the English word "Robot."