Funny thing that happened to my IA on Balmorra:
So, he is infiltrating some group or other. Naturally, to disguise his true nature, he has to switch from a British accent to an American one. Because of course, if they heard him with a British accent, they would see right through his disguise.
The fact that he spends the entire planet wearing a jacket with an Imperial logo on the sleeve doesn't tip them off, of course.