Hi, and welcome on board :-) --SabineEller 09:10, 3 June 2010 (UTC)
Welcome, Nilli. You've arrived at a time when things are moving fast :-) We have just updated mediawiki and installed the translatewiki extension. If you are planning to translate pages you will need to decide whether you want to work on-line, or off-line using your preferred tools. Either way, I'll need to give you Translator status.
Meanwhile, some reading that might be helpful: