- to bring the necessity of localisation to the front
- to support the localisation of MediaWiki and Kiwix
- to make the MediaWiki projects more usable
The translatewiki rallies give an additional incentive to our localisers to do a little bit more. Many languages, including big ones like Spanish or Hindi can do with more effort. Both languages are used as "fall back" languages when the localisation of a language is not adequate but they need to be complete to do their job.
MediaWiki does gain relevant functionality over time; off line support with Kiwix and mobile telephone support now integral to MediaWiki are recent examples. This support is not restricted to Wikipedia, it is available to Wikimedia and non-Wikimedia projects alike.
You can join in the fun of the rally, you can make the user interface in your language more usable. The info can be found here but all your contributions are welcome for any and all the projects we support at translatewiki.