Earlier quoted context omitted.
Not singling you out, all the articles do it, but: Strange to call this Byzantine. The coins found are from the reign of Constantius II, who at times ruled the whole empire alone (as did his successor Julian). The idea that the East, even when administered separately, was some foreign/"Byzantine"/not- really -Roman "other" was invented much later.
Well, probably Greek-speaking rather than Latin-speaking, right? And with that, would there also be some cultural differences?
The notion that people are mostly monolingual, and that language is very closely tied to a cultural identity, is a modern projection (and far from universally true nowadays as well).