These are slides based on how one would go about translating text for different pieces of software on the XO machine for OLPC. Typically, translation involves a good understanding of different pieces of software, but Pootle makes it easy. Its a web component that allows anyone to type in translated strings and click a button. That's it!

See attached slides for more specifics. 

Update: Slides with newer screenshots are available at http://dev.laptop.org/~sayamindu/pootleforxo2.odp [1] and http://dev.laptop.org/~sayamindu/pootleforxo2.pdf [2]