Rick Hellman — Telling languages apart may begin in the womb

This relates to the debate over what is innate (natural) and what is acquired (learned). 

While language is mostly acquired, the ability to learn a language is innate, research shows.

Decades old research has shown that infants can distinguish language from random noise, that is, they can sense a signal and discriminate between signal from noise. Now it appears that this is also true of fetuses.

World Economic Forum
Telling languages apart may begin in the womb
Rick Hellman | Writer for Futurity