Gibson committed two mistakes. He omitted Greek entirely, putting Latin in its place, and he did not--despite knowledge of the fact that Aramaic is spoken in certain areas--solicit the help of some Aramaic-speaking locals in his production. I wouldn't have minded seeing a resident of Ma'loula playing the role of Jesus. Still, judging by the trailer, Caviezel appears excellent as a Semitic Christ. The critical test will concern his pronunciation of Aramaic. For Semitic ears, this will require a very strong effort, as it is a difficult task for a foreigner to sound convincing to such ears.
My impression is as follows: he doesn't sound bad at all uttering his one line in the trailer (what surprised me is that the Aramaic and Arabic words for "My God" seem to sound precisely identical: "Ilahi"). However, I managed to hear him quote a few lines in a television interview, and I must say, with the hope that for convenience' sake he decided to forego utilising a proper Semitic accent, he sounded quite bad. I can only hope that the silver screen will do to his voice what it convincingly does to his physical appearance.
In IC XC