When did we start choosing?

Can this be placed in the evolutionary process? Can the linguistic revolution be explained without free choice?

I think so. I don't see a need for free will in the background of language development. Incidentally, animals also have languages at one level or another. But the differences between us and them do not necessarily lie in the fact that we have free will, but in the gaps in intelligence.
Although I once wrote a column about intelligence in which I argued that deterministic creatures do not have intelligence. But that is a general claim. In my opinion, language development is not unique in this regard.

Still, is there any suggestion for a place in the evolutionary process? Or in other words, what in man compels you to conclude that there is free choice, and in any case at what stage in history must one already assume it?
Or does this stem from introspection and in any case it is impossible to extrapolate to previous events? Shouldn't such a significant change give its signs in historical events?
The same question in terms of interpreting the biblical description.

I don't understand what you expect beyond what I wrote. Indeed, the conclusion that we have a choice is the result of observing the present. I don't know how to say anything about the past. It's a distant past, so it's not reasonable to expect clear historical traces of this change.