Lets try a conversation with them:
Hi My name is Jane, I go to XYZ High School, are you new around here? what school do you go to????
Daughter: I never went to any school, I am not from around here..I actually have no clue where I am from....
Jane: I am going to the mall would you like to come?
Daughter: Mall? what is a a mall? I am not allowed to go without a chaperone,
Jane: how old are you?
Daughter: I am 15 and will be 16 on my next BD
Jane: :waitasec::waitasec:
YES IT WILL TAKE YEARS TO GET THEM UP TO SPEED.
Then they have to eel comfortable with humans...Hmmm, I have seen how that plays out --
I have seen it first hand...
BUT ...You are the expert. so be it.
Actually, they would have a lot to talk about, not only about their past experiences (which is pretty unique) but also the sorts of things teenage girls talk about with each other. I'm sure they will have lots of questions of the sort that neither their mother or grandmother are going to be able to answer, for that you need friends of the same sex and same age.
We are told that they are sharp and intelligent, what they lack is social skills when dealing with strangers. There is only ONE way to aquire those skills, and it does NOT involve therapy.