When you are localising the MediaWiki messages on Betawiki, it often helps when you know how the same message looks like in other languages. It can inform in what languages a messages is still !!FUZZY!!.
In and of itself this has not been the most technically challenging change. It is however a great usability improvement. These changes often just pop up, long time editors often do not notice such small things, they are used to their way of doing things, they need to be informed :)