If you mean by thinking, then yes. Just as most smart animals, like chimps, some big cats, and even fish, then yes. I garantee it will be stuff like, well, how do babies talk? sort of like that. Think about it. Mostly, these are a cats' thoughts;
Lunch, me over to bowl for lunch, or, Sleep, me over to bed to sleep. Sound a load, but its' true, babies can think as in talk in their heads.
No.
there mouth
They usually learn to talk by the age of 2.
i don't suppose. because babies 95% use baby talk
ya sure
I believe that this means the babies head is in the correct position for birth.
No, babies do not talk right after birth. They are not able to at that age.
nothing they dont talk
Many babies learn to talk first. Babies can usually speak a few words before they walk. However, there are some babies who do walk early and have yet to speak their first words.
no
yes
I don't know about the babies, but you definitely write your own language. Your question should read: "Do babies talk their own language?"