Andrew Vos has mined Github comits to determine amount of profanity in GitHub commit messages per programming language. He analyzed 929,857 commit messages and found 210 instances of any of George Carlin’s seven dirty words.

C++, JavaScript and Ruby developers used the most profanity. PHP and Python developers used the least.

You can find more information in the original post. Vos also made available a list of all the commits containing profanity.