Posting my comment here as well for completions sake:
This issue is the main attraction for VW4 for me. I much need to have a function to post translations of wikis. For example: if you have a wiki about bengal cats in English, that wiki would have flag icons for other languages. Clicking on those icons would bring the user to the German, French, Spanish translation of that article. (or whatever languages the admin has defined).
This Issue does not seem to describe this function.