Humans acquire languages indeed naturally. Although newborn infants can not speak anything, they acquire normal speech by hearing adults' conversations without some explicit training. Human infants learn a language which they are exposed to in childhood. Although it is impossible for adults to acquire a new language in the same level of the language which was learned in childhood, adults learn some new languages with considerable efforts.
CITATION STYLE
Yamaguchi, C., & Izumi, A. (2008). Vocal learning in nonhuman primates: Importance of vocal contexts. In The Origins of Language: Unraveling Evolutionary Forces (pp. 75–84). Springer Japan. https://doi.org/10.1007/978-4-431-79102-7_6
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