Start with any English phrase or sentence. For example:
"Making Wireless Work"
(which happens to be a slogan of the company I work for). Then translate it to French. Then translate it back to English. Then translate that to German then back to English. Repeat for Italian, Portuguese, and finally Spanish for good measure. Here's what you get at the end:
"In order to finish the works without the chain"
Courtesy of Lost in Translation, where you can enter any phrase you want.