Hello,
We support namespaces aliases depending on the user gender. This is perfect for the USER and USER_TALK namespaces. As of february 2011, we add aliases languages per language (ex: r82719).
Since people here probably have lot of international contacts, would it be possible to start translating the USER ns in as many languages as possible for the MediaWiki 1.18 release ? :)
The bug report was https://bugzilla.wikimedia.org/27691