mixing languages

he is starting to mix languages, points at and says 'eyes','nose','mouth' and then suddenly 'ngaartau'(forehead), 'mean'(face)... He holds a tv remote controllers and puts it against his cheeks then says "hello", as if it were a mobile phone. He has only started to develop some separation anxiety when i say bye-bye and close the door behind him he cries very loud. He says 'di-oo' or 'di-u' for the letter "W". He also says beet for 'feet'. Some new words include 'donkey' & 'lamb'. He now wears a pair of Size 8 Clarks Sandals. I took him to the pet shop and showed him some puppies he said "cat" I corrected him "dog" he then said "dot" !! Its amazing how he is soaking up languages like a sponge with water. When he sits at the back of the car, he would say "beng"(biscuit) followed by "beng"(biscuit), and then "nai-nai"(milk) and I would offer him these things if i were not driving. He refuses to wear a hat but loves to have his shoes put on as he expects outings after the shoes. He says "apple" for any fruits that he doenst know the name of.