I have the idea before i have thought of the word i would use to express it. Sometimes, i don't even have word to express it, "you know what i mean?".

And like i said. Children will often act, then talk. Or seek their words for long period of time, and when you propose a word to help them vocalize, they can accept it or reject it.

I have another example. Do you ever have slip of the tongue? You're talking about "yoga", tell yourself while speaking "i really shouldn't say 'yoda' here", and say the word "yoda" anyway? This happened to me a lot when i was younger (my speed of thought is lower those days, i don't think i slipped this way in two or three years). I still think a bit faster than i speak tbh.