responding just to the op, I don't see profanity as breaking immersion or anything.
Just, on a personal level, I'm not too comfortable with excessively coarse language (by that I mean worse than fuck and shit). So If I'm RPing with someone and the worse words like "cunt" start coming out, I would ask them if they could tone down a bit, but that's just my sensitivity, not a comment on the validity of harsh swears in RP.
For me, the only language that I would really want to change due to RP immersion would probably be units of measurement when there's a canon, known alternative, ie miles to malms and so on.
Just, on a personal level, I'm not too comfortable with excessively coarse language (by that I mean worse than fuck and shit). So If I'm RPing with someone and the worse words like "cunt" start coming out, I would ask them if they could tone down a bit, but that's just my sensitivity, not a comment on the validity of harsh swears in RP.
For me, the only language that I would really want to change due to RP immersion would probably be units of measurement when there's a canon, known alternative, ie miles to malms and so on.
RP scrub incoming 