To be fair, I didn't mean that they had to get actors from the countries of the accents to play the parts, just actors who can speak the accent that is required.
I reckon actors should just do their own accents if they can't do the character's accent. It's actually much easier to suspend disbelief if you're not wincing every time the actor opens his mouth!
I don't really know what accent this should have been spoken in, but I remember crying with laughter at John Wayne's "Truly this man was the Son of Gawwwd" at the end of The Greatest Story Ever Told.