I would give everyone from Lindblum London accents, because Lindblum sounds like London and it sorta reminds me off it.
And everyone from Alexandria would have American accents because of the whole world domination thing.
I would give Burmecia Northen Europian accents, like Swedish ones or something.
Those dwarf people could have scottish accents.
And Dali could have Welsh accents and Treno could have really dodgy Mexican accents.