(ELI5) when babies are raised with bilingual families, are they learning it as just one jumbled language, or as two separate languages?

Question

Also would it become difficult to discern and seperate them when they join school for example, and interact with people that only speak one

In: 37

Answer 1

Grew up with two languages. Primary language until I was in kindergarten was Hungarian, once in school I started speaking english. I had dreams and thoughts in Hungarian up until high school.

I still have oddities in my English language however no accent or other indications that I’m bi(tri if you consider my Spanish) lingual.