All Roman Soldiers somehow have British accents, too, remember?
I kinda like that, actually. British accent sounds, well... Classy... Shakespearean... And... Stuff...
I recently saw "The Eagle" where most Romans sound American and it just felt funny. And not at all in a good way.
I haven't seen The Eagle
, but they intentionally made the Romans sound American because they were trying to make some lame point about the Roman Empire being the America of its time, or something like that.