(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

Two separate languages. They figure out the differences, it can delay their oral expression for a bit while they sort it out, but they understand that mama and papa are speaking different languages, even if they don’t conceptually understand what « a language » is.