I've observed my kiddo when he was a toddler and I think there might be an inflection point when they are very young and don't speak so well, when they might be

I've observed my kiddo when he was a toddler and I think there might be an inflection point when they are very young and don't speak so well, when they might be able to learn any language with ease, precisely because they don't recognize let alone speak even their own so well. I recall my kid was watching TV and all and at some point while eating he pointed to a drawing on a cocoa box and said "monkey!" in English, and indeed it was a monkey. Must have picked it up from cartoons or something. But then there's a point of no return when they learn enough native language from which point on any attempt at a foreign one becomes deliberate practice that requires effort. And this point of no return follows very early from the point when they start to speak.