[xwiki-devs] context.language having wild values?

Hello developers, We had some (rare) users that had a very bad issue because we told their browser to load the lang_xx.js of their language. And their language was... wild! See: http://jira.xwiki.org/browse/CURRIKI-5694 for a sample of the things that got submitted to us. Sure, we'll now protect against these bizarre languages, still, there might be other things broken. Is there some guarantee on the set of possible languages provided by $context.language? I was expect the possible values of ISO-623-1 but that was clearly not sufficient! paul