And please allow me to refer to real and actual scientific studies. The critical period for language acquisition Snow, C. and Hoefnagel-Hoehle, M. (1982) - ht

And please allow me to refer to real and actual scientific studies. The critical period for language acquisition Snow, C. and Hoefnagel-Hoehle, M. (1982) - http://grammar.ucsd.edu/courses/00-OLD/lign179/snow.hh.82.pdf http://grammar.ucsd.edu/courses/00-OLD/lign179/snow.hh.82.pd... On the precise point of learning a L2 language, teenagers and adults learn faster and better than children: "The crucial findings of relevance for the CPH were that the 3- to 5-year olds scored consistently worse than the older groups on all the tests and that the 12- to 15-year-olds showed the most rapid acquisition of all the skills tested. These findings are basis for rejecting the hypothesis that the period 2 to 12 years constitutes an optimal time for language acquisition." And a second one: Maturational Constraints on Language Learning Newport, 1990 - http://onlinelibrary.wiley.com/doi/10.1207/s15516709cog1401_2/abstract http://onlinelibrary.wiley.com/doi/10.1207/s15516709cog1401_... Different rates of L2 may reflect psychological and social factors that favor child learners, instead of mere brain chemistry: "The evidence from several studies of both first and second language acquisition suggests that normal language learning occurs only when exposure to the language begins early in life."