Yup Acient Greek was very very complicated! And Modern Greek is really a lot more simplified than Ancient!
Anyway I remember some of the things they said in Age of Mythology - and they are mostly related to what you put them to do

For example when you put the peasants to work on a mine they say "Metallefs" which means miner in Ancient Greek. And if you put the peasants to chop wood they say "Dree-tomos" which means lamberjack in Ancient Greek.
And I remember the warriors when you order them they say: "Proso-hee" which means attention. Or when they say "Foro!" it means tribute (to the kingdom or whatever they are fighting for). Or when they say "Voo-loh-meh" which means I am willing....
And I guess all of the cultures in the game that they have their Ancient languages say something similar in their language