Surely you know about the "infoboxes" Google now places next to (many) search results: https://en.wikipedia.org/wiki/Knowledge_Graph There's been a lot of speculation around the effects they have on the resources they link and pick data from, I'm not so interested in continuing with that. What I've been looking for in the last few months without success is an authoritative list/timeline of the languages/countries the feature has been enabled or expanded for. As you can see on the article, we only know that it was introduced in May 2012 and expanded to 7 more languages in December; and, per one blog, expanded a lot in July 2013. This is not enough. If you know any important date/event/whatever, please add to the article (or to the talk page or here if you have no source).
Nemo