Human will know what they want to express, choosing words to express it might be similar to LLM process of choosing words, but for LLM it doesn't have that "Here is what i know to express part", i guess that the conscious part?
Not really. More often than not my thoughts take form as sense impressions that aren't readily translatable into language. A momentary discomfort making me want to shift posture - i.e., something in the domain of skin-feel / proprioception / fatigue / etc, with a 'response' in the domain of muscle commands and expectation of other impressions like the aforementioned.
The space of thoughts people can think is wider than what language can express, for lack of a better way to phrase it. There are thoughts that are not <any-written-language-of-choice>, and my gut feeling is that the vast majority are of this form.
I suppose you could call all that an internal language, but I feel as though that is stretching the definition quite a bit.
> it seems like that would pretty analogous to how humans think before communicating
Maybe some, but it feels reductive.
My best effort at explaining my thought process behind the above line: trying to make sense of what you wrote, I got a 'flash impression' of a ??? shaped surface 'representing / being' the 'ways I remember thinking before speaking' and a mess of implicit connotation that escapes me when I try to write it out, but was sufficient to immediately produce a summary response.
Why does it seem like a surface? Idk. Why that particular visual metaphor and not something else? Idk. It came into my awareness fully formed. Closer to looking at something and recognizing it than any active process.
That whole cycle of recognition as sense impression -> response seems to me to differ in character to the kind of hidden chain of thought you're describing.
As a shortcut my brain "feels" something is correct or incorrect, and then logically parse out why I think so. I can only keep so many layers in my head so if I feel nothing is wrong in the first 3 or 4 layers of thought, I usually don't feel the need to discredit the idea. If someone tells me a statement that sounds correct on the surface I am more likely to take it as correct. However, upon digging deeper it may be provably incorrect.
The thinking slow version would indeed be thought through before I communicate it