aramaic or canaanite was used as the regional language at the time so it was used all around mesopotamia at the time of Christ for most ordinary conversation while other languages had a greater import in imperial affairs and such...
thus it is said that the language of Christ and indeed perhaps even the language of the 10 commandments (if you watch the movie with Charlton Heston they're actually written in the old Phoenician script that aramaic used) ... If you watch Mel Gibson's movie The Passion of the Christ, a lot of it was actually filmed in Aramaic... not that I've ever seen it, that's just what I've heard
