Website YouSwear teaches you to swear in over 200 languages, from Afrikaans to Zambia to Firefly.
Bill Gates predicts that the best education will come from the web in five years, but YouSwear demonstrates how nearly everything worth learning is already available on the internet anyway. Click on any language in the site's sidebar to browse through user-submitted swears (the accuracy of which is also user-vetted through familiar thumbs up/down buttons), search for a specific swear (which will get you to a page titled, for example, "How to say sh*t in any language") or choose from the quick list of common curses. There's not much more to it than that.
The site, is, of course, not safe for work. Photo from GeorgeCarlin.com.