Hoi, When a second or subsequent project is requested for a langauge, there is a requirement for a full localisation of the User Interface. This does benefit all people who use their language in projects like Commons, Meta.. The full localisation means all MediaWiki messages and all the messages of extensions used in the Wikimedia Foundation.
In the request for the Japanese Wikiversity, there were complaints that it is unreasonable for the people requesting a new project to have to do this work. It is indeed not fair. It is for this reason that I ask all Wikimedia editors to help out with the missing localisations. There are few moments when we can make requirements and thereby ensure the quality of the localisation. This helps our readers, our editors in doing what we all want them to do; read and create good free content.
Thanks, GerardM
* BetaWiki http://translatewiki.net * Statistics of the localisation per languagehttp://translatewiki.net/wiki/Translating:Group_statistics