The real bottom line is that you have no knowledge of the Maccabean revolt.
Judah refused to relinquish their language for Greek even under penalty of death, and overthrew the Syrian Greeks in that revolt to retain the Hebrew language.
No Jew of that era would ever have spoken Greek for any reason. Even the Edomites and Romans had to accept that fact.
From everything I read, they despised the Greek language so they chose instead to continue with Aramaic as their language of international trade.
So no actual proof from you, just a big claim.