I find it amazing that if a child is brought up in a community/country different from the origin of the child, the child is still able to pick up and speak their language fluently. Our ability, as humans, to imitate and communicate is incredibly complex regardless of where we are from.
So my question is, is there a language that cannot be spoken like this? One which only people with a certain genetic advantage can speak fluently during upbringing.
Of course anyone can learn a language by putting effort into it. My question is only for one learnt during upbringing (native language).
(Not sure why my responses are downvoted. I’m a non-native English speaker. Sorry if I didn’t communicate something properly. It’s just a scientific curiosity.)
Usually, difficulty to learn a language is caused by:
Another thing, relevant in the light of other comments: language is mostly what’s inside our heads, not our mouths. Small differences in the vocal tract can affect a bit our pronunciation - like the pitch, or ability to pronounce specific sounds, but in the big picture they’re mostly irrelevant and “abstracted out” - it’s like when you’re writing, it doesn’t stop being written [Mandarin|English|Spanish|etc.] because you used a red pen instead of a black pen, you know?