[Caveat lector: I’m not from language acquisition, my main area of knowledge within Linguistics is Historical Linguistics.]
Native proficiency is a result of a language acquisition ability that is not well understood and disappears early into child development.
That’s the critical period hypothesis. It’s more complicated than it looks like, and academically divisive; some say that it’s simply the result of people having higher exposure and incentive to learn a language before they’re 12yo, while some claim that it’s due to changes in cerebral structures over time.
And then there’s people like Chomsky who claim that the so-called “window of opportunity” is to learn Language as a human faculty, not to learn a specific language like Mandarin, Spanish, English etc.
Catoblepas@lemmy.blahaj.zone 1 year ago
I’ve legitimately never heard polyglot used to mean “speaks two languages”, I thought it meant “speaks three or more languages.” I can understand it being useful to have a specific term for people raised with two languages from birth/very early childhood though.