Translate.net Main_page does not show right translation for zh-tw users by default
Fragment of a discussion from Talk:Main Page
Looks like this behavior has been there for many many years. The message loading sequence doesn't check for fallback translations in mediawiki namespace.
Nike
Can/should be fixed? (think so...)
It's possible and even reasonable. However we should be prepared expect ugly issues on WMF projects that might rely on the current behavior a tad too much.
Nike