DD8.5 started her language around the age of 3 and sometimes reverts back to it when she is trying to think aloud and doesn't want DD3.5 to know what she is talking about. And vice verse - talk about confusing - each of them wandering around talking in their own language at the same time! (It drives DH husband crazy some days wink )

The funny thing is though that they also have their own language between themselves which no one else knows.

Some of my friends have commented on their "noises" and they explain that it is their language and sometimes give the details of it and sometimes not.