When things reach a certain maturity, visible things can happen really quickly. Another Christmas present is this presentation of the localization of MediaWiki. It shows the quality of the localisation of the MediaWiki software.
You will see a lot of red, not good. This is a typical situation of the "cup being half full" as the list is includes more languages. With a new visualisation you can not compare. So you do not notice the many recently added extensions. You do not notice the many recently added languages. You do not notice that there would have been more red for many languages. :)
If you want to help MediaWiki, help us improve the MediaWiki localisation for your language at BetaWiki..