Thread:Project:Support desk/How Can I Add The Languages box on my wiki?

At the end of most help pages here in Mediapedia there is a Languages box which holdings links to the same article in various languages. I have been googling and searching the web for the past few hours trying to find out how I can add that functionality to my own new wiki, without any luck.

I have the following wiki:

elpradowiki.xtreemhost.com

I want this wiki to contain articles in both Spanish and English. I want to do this as simply as possible so I don't mind that the menu and sidebar titles will stay in English. And I don't want to install the wiki twice.

A step-by-step guide on how to do this would be much appreciated!