Last modified: 2011-03-13 18:06:30 UTC
Currently MediaWiki treats the system messages as if they contained wikicode, which produces bizarre and misleading results for messages which contain accepted HTML tags. The messages often contain <a> and <span> tags, which leads to a strange mixture of untranslated and partially translated HTML.
Most of them are in wikicode so not rendering them as such would be a misfeature, marking this as WONTFIX.