I read a thread that asks could Latin have replaced Greek in the ERE,
it would play some part in lessening East West rifts between the Roman Empires and the Churches. The thread is over a year old so i cant reply to it. Hard to see how it would happen once Greek was so well established.
But it led to another Whatif
Could greek have supplanted Latin in Rome before the Republic, might there have been a way Greek might have become the language of the Aristocracy that overthrew the King.
Or might the Romans have adopted Greek later on. Yes unlikely.
What if Greek and Latin were given some special equal status, so the Empire became effectively bi-lingual. A latin Greek commonwealth instead of the Empire ?.
Another way to avoid the Latin Greek diivision of the ancient world.