So I have sort of a main personality me voice but also something called right brain....it's kind of an alternate consciousness and still me...but it adds a different perception....both these guys sound identical...like me but they come from different locations in my head...the right and left sides. Still me had them all my life no issue. For me the internal hallucinations were capable of whole extended convos and they sounded like somebody else often someone I knew distantly by also various made up people...but they didn't speak as me so much as to me. This is easier to distinguish with full sentences and it sounds like you are getting fragments so the grammar clues might not be there but you should be able to tell if it sounds like you....