I was speaking of phonetically soft, but I see what you're getting at with the interpretation that dwesr2648 shares with the "clean variants". Come to think of it this actually brings to memory all those safe for TV dubs they'd substitute for curse words. Those must surely be a direct application of "alternative curse words". After work I'mma try to see if anyone made a YouTube mashup for dubbed curse substitutions. I always got a kick out of those as a teenager.

hilarious, a search suggestion for "alternative curse words" was this "alternative curse words for moms who swear". I love it :-p