Thogay powla nigiravak.

About a year ago, I linked to Wikipedia's long, long list of obscure racial slurs because sometimes a fellow just gets to wondering how an Ashkenazi Jew would insult a Mizrahi Jew. Chakh-chakh is the answer, by the way, intended to "ridicule the preservation of the pharyngeal (guttural) pronunciations of Hebrew consonants ח ħêth and ע ‘áyin by Mizrahi Jewish immigrants." I mean, you just won't find that sort of knowledge randomly and I'm happy to have played my part in making this a more hostile world.

Anyhow, it's a useful resource, sort of, but it has limitations. Sure, it gives you a word - sometimes several - to hurl at just about any minority you could imagine, but it doesn't translate the truly offensive phrases for you. You know, the ones that generally involve some sort of unsavory conduct with ones parents or some such. Well, thanks to Metafilter, I am now able to present you with the Swearsaurus, which covers a dizzying array of languages, including Esperanto, though God only knows when that would be useful. It's a lot to remember, but you'll be glad you took the time when you find yourself in Afghanistan and want to know how to tell a Pashtun-speaker that his grandmother is dead but her hoo-hoo is still moving ("Ana de mura naighaie shori").

Also linked in the comments and more in the spirit of the original Wiki is the Profanisaurus, though it's only fair to note that it occasionally includes almost helpful definitions like these three:

bott v. A sex act performed by botters (qv).
bottee n. One who is botted by a botter.
botter n. He who botts.

I think I can figure it out, but still. Employ some quality control, you madarchods.