I must say I'm surprised at how many people are 'borrowing' material mor their monologue, or outright using a written one. Almost everyone I've asked is self-devising it, andf the only one who isn't took his original material from a feature article. I just don't see why people are so worried about self-devised monologues, when with a self-devised monologue you can tailor it to be whatever you want it to, and the odds of someone else doing it and impinging on your own mark are effectively zero. For example, mine's an introspective look at the life of an archvillain, which allows me to weak a huge suit of armour, use my evil skills and introduce a great deal of techniques, as well as indtroducing humour merely from taking such a ridiculous concept so seriously.
Incidentally, I have my own views on swearing in any performance, which aren't exactly BoS canon or anything, but have never steered me wrong. Unless that (or those) specific words are so vital to your performance that to replace them with something less offensive would have a genuine result in your mark, drop them like a twelve-ton sack of decomposing turd. To keep them in, unless they genuinely add to the performance, implies a lack of in-depth thought on your part, shows a potential lack of maturity and creativity (anyone can swear to show anger or whatever, but it takes creativity not to), and when present in number or severity too drastic, makes your performance seem based purely on shock value, a sure way to drop out of the A-range.