How Many Languages Can a Child Learn?

I'm intentionally avoiding an in-depth conversation here on the methods of language acquisition. I want to tell you any method can work, just basically exposure and there's probably no bad method. Just a matter of finding things that balance that metric between pleasure and kind of one of the child wanting to do it. It's easier today to be a polyglot than it ever was before. There are noted polyglots who have studied 50, 60, 70 languages.