Do any of you have kids who have made up their own language? My DS4 has begun to talk in nonsense words. At first, I thought he was mimicking baby talk, but he told me it's an alien language from the planet Ziberton. He'll murmur to himself in this language while he's coloring, drawing or playing with legos. I've also heard "Zibertonian" come out of the mouth of his best friend from preschool, so he seems to be infecting others.