The Ripe age to learn a language

There actually is a time when you learn lang. the best

Eric Lenneberg came up with a hypothesis that states "There is a time in your life in which you learn language the best". He said this age is approx. the age of 2 to puberty. In this time your brain has not gone through lateralization. Lateralization is when your brain develops specialized abilities for each side of the brain. Lateralization negatively affects learning language