One might assume that more profanity in a langage = more frustration with that language. But I'd bet that proportion of business use has something to do with it

One might assume that more profanity in a langage = more frustration with that language. But I'd bet that proportion of business use has something to do with it, too. If you're hacking on a personal project, you might feel freer to swear in your commits. And my guess is that you're more likely to code Ruby for personal projects than C#. But I could be wrong.