@Xantar: Stone’s idea was that the Macedonians would speak with an Irish accent, while the Greeks spoke with an English accent, to emphasize the “barbarian” (i.e. foreign) nature of the Macedonians to the Greeks. But putting modern accents or dialects on ancient or historical peoples will always sound funny to us, because we immediately think of modern day stereotypes.
It’s a terrible movie with terrible acting and a terrible script, based on a terrible book (Robin Lane Fox’s history, which views Alexander, one of the most bloodthirsty, egomaniacal tyrants in history, as a sort of “boy’s own” adventure story hero.)