I suppose the way forward for wikipedia in general is to divorce their existing css from font declarations. Have font declarations based on langauge, then there would be the need to track all information, all data wrt language. You would beed to know what the language of any paricular piece of data is, and serve up content with appropraite language declarations and allow browsers to sue langauge specific styling.

Such an approach would mean that content authros would need to markup any change of langauge within an article. captions and dat about images and objects would need to also e tracked.

So not only would there need ot be changes to the mediawiki content insfrastructure, but the content itsself would need to be updated. And editors would need to change who they mark up content.

If you really want to make it posisble that nayone could potentially access nformation in any language.

But ultimately there are somethings that the end user would have to do as well. There is no escaping that.