I've had this problem for maybe a month and I've been ignoring it all the time, but it had finally started getting annoying. I had the mod "Armor Disguises" and for some reason, even after removing the Forsworn armor, he'd still yell random Breton stuff when attacking (mostly ore veins). Found it funny how he'd try to disguise by doing that xD. I think the mod is broken / I broke the mod. I thought it was a hidden quest and tried to find its ID to end it, but it's hard to tell which ID belongs to which quest >.<. Eventually gave up. Didn't think I'd find anything by looking up "Forsworn forever! For the reach!" xD I was wrong. Thank you Madra! I was stupid for not thinking about factions. EDIT: Omg did I just necro a thread? If so I'm sorry. I've never been here before *facepalm* *wish I could delete*