How Do Babies Become Bilingual?

Have you ever seen a kid talk to her friends in English, but to her mom in Spanish? Learning a second language can be really hard for adults, so how do bilingual babies learn two at the same time?

but how the bilingual babies learning two languages?
Hosted by: Brit Garner
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Sources:
http://www.linguisticsociety.org/resource/faq-how-do-we-learn-language
http://www.csun.edu/~vcoao0el/de361/de361s71_folder/tsld051.htm
http://www.livescience.com/13016-bilingual-babies-brain-language-learning.html
https://pdfs.semanticscholar.org/6b62/3542ae9faff319ab686da7cc2f8dc6612b70.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3583091/
https://www.psychologytoday.com/blog/life-bilingual/201012/bilingual-infants
http://www.nytimes.com/2011/10/11/health/views/11klass.html?_r=0
http://science.sciencemag.org/content/316/5828/1159
https://www.ncbi.nlm.nih.gov/books/NBK11007/
http://home.fau.edu/lewkowic/web/Eimas%20infant%20speech%20discrim%20Science%201971.pdf
https://www.sciencedaily.com/releases/2011/08/110829070559.htm

Видео How Do Babies Become Bilingual? канала SciShow Psych