I don't know if it will help, but my son (almost 9) likes to swear backwards... so instead of F*** he will say ''Kuf", instead of S*** he says 'tish'.
He seems to think its funny because people don't always 'get' what he's saying. I don't love it, but have to pick my battles...

Otherwise I would suggest modeling ridiculous sounding things when you feel like cussing. Like flabberknackle! or funky fish! Or fresh farts! He will still get a reaction from others, but hopefully one of laughter rather than scorn...

My son said to me just today that there really are no such things as cuss words. They are just words we, as humans, made up and therefore can't actually be offensive on their own.
Ugh. How do you argue with that logic?

My 5 year old has started swearing as well and It had gotten to the point that we are unable to go out in public because if he became upset then he will begin to scream and swear. Ive tried redirecting and taking away things that I believe to be triggering (video games) However the one thing that really gets to him is when I fake cry. My son can't stand to see me upset (crying) and will stop momentarily. It has been going well so far and I even have his teachers trying it at his school. Good luck to u I know where you are coming from and what u are going through.

We try "practicing self control". You're upset and you want to swear, but let's try not to...or maybe start with just swear 2 or 3 times while your upset this time? If he's successful offer up a reward. Then next time he's upset ask him to have self control and only swear 2 times.

We are going through this, but my son is 21. We with hold dessert or special treats, sometimes, he has to giving the corner, and when he comes out, he has to explain why what he did was wrong. Apologize to everyone present when he acted out.

@ Jamie, I love that, I'm going to try it, my 12 yr old with Aspergers has heard these words from his classmates @ school & thinks they should be used, I tried to explain to him that the words are "not nice" but he uses them anyway. Imagine my embarassment when he used the F bomb in church.... My pastor is very understanding, she had a discussion with him, it didn't help either... so TY for the advice! <3