Learning language is a part of children's brain chemistry. They are literally built to learn language. There is no myth (i.e. Title of OP is "Another Myth"). There is no false conception.I frequently encounter the false conception that children are better at learning a second (or 3rd, or 4th, etc.) language than adults. Leaving aside first language acquisition (including symmetrical bilingualism), children are very frequently more successful in acquiring a second language in the long run, but adults are in many ways far more skilled language learners. Maybe that will seem like splitting hairs, but the point remains.