If Jesus was a child, he was a child. That means he was—literally—a normal human being. That means he learned his language from her. That means he playd with other children. Furthermore if she was a pious woman from, as the story goes, a priestly family, she was the one who taught him his prayers. He grew up as a Jew among Jews, was from a family of Judeans who probably had settled in Galilee during the time after the Macabees had won independence from the Syrians. It goes without saying that he had resources that no other child had, but he definitely was not a superman.
He didn't learn this stuff from Mary...
Luk 2:49 And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father's business?
Luk 2:50 And they understood not the saying which he spake unto them.