Young kids don't even need subtitles, their brains are wired to figure out spoken languages, after all that's how we all learn our mother tongue initially. Last

Young kids don't even need subtitles, their brains are wired to figure out spoken languages, after all that's how we all learn our mother tongue initially. Last summer my then 3.5 years old, to my huge surprise, started talking in (simple, but correct) English with some tourist kids she met in the park. We never spoke English in home with her before, so I presume she picked it up from youtube and her older brother, but I had no idea she can form full sentences - including conditionals and past tense. And at first she was a bit slow to express her self, but after a few hours of play with those kids she sounded totally relaxed and fluent.