
Well I don't think accents will matter to most RPers. When people cry "lorebreak" it's normally in reference to an aspect of a story, the entire story, and/or a character's skills, feats, and/or flaws.
Basically, if giving your character an accent won't make it overpowered, it's fine.
Basically, if giving your character an accent won't make it overpowered, it's fine.