Maybe this is not the right place for it, but I feel people are sensible here so...

Our son (5) has recently started to make up swear words. He never hears any from us, it's just gibberish. But the tone and expression are unmistakable. He does it over things he finds frustrating (being behind in a game of chess, having to stop playing to tidy up). TBH it's kind of funny.

I feel like I should teach him other outlets for frustration and even considered teaching him swearwords. But I'm kind of drawing a blank on how to help him with this. Should I just let him figure out his own ways and only correct if he does unacceptable things? Or is there a way to help him express himself gracefully and blow off steam?

My husband is super preoccupied at the moment, so I don't want to bother him with small fries just now.

Any ideas would be welcome! :-)