However the point of my chronology was that putting it earlier than the Ziggurats still doesn’t put it earlier than the Egyptian culture that produced tomb slabs (that led to the step pyramid) or (eventually) written Egyptian and thus the indirect evidence is that Egypt as a pyramid builder culture and Egyptian – speaking culture looks to have been in place long before any feasible ‘Babel Tower’ event.
Could be. Egyptian culture could have existed along side the tower of Babel. And symbols used in Egypt could have also co-existed. But as for a written language, the earliest evidence of Egyptian language is 2800 BC.
“The use of hieroglyphic writing arose from proto-literate symbol systems in the Early Bronze Age, around the 32nd century BC (Naqada III), with the first decipherable sentence written in the Egyptian language dating to the Second Dynasty (28th century BC)”
But, “Egyptian language” was more likely influenced by the Sumerian region.
“Geoffrey Sampson stated that Egyptian hieroglyphs “came into existence a little after Sumerian script, and, probably, [were] invented under the influence of the latter”, and that it is “probable that the general idea of expressing words of a language in writing was brought to Egypt from Sumerian Mesopotamia”