Why Do Children Learn Languages?
Do you mean why or how? The answer to “why” is to communicate, and the reason for teaching foreign languages to children is that knowing a language (or several) in addition to one’s own is a valuable skill and that the younger one is, the easier it usually is to learn new languages. So the “how” part is that children pick up language by hearing and imitating the speech of the people around them. I’ve read that the brain center that facilitates language learning is most active in childhood and actually shuts down about the time most of us have the opportunity to begin studying one.