We'll create fresh WordPress site with Wikipedia for tag pages installed. You have 20 minutes to test the plugin after that site we'll be deleted.
This plugin creates a widget that displays excerpts from Wikipedia on the tag pages (the template tag.php). The user can specify multiple languages for the plugin to query using the Wikipeida API. The language that has an article that matches the tag has its article displayed.
This widget is based on the WordPress-Wikipedia-Widget by patlockley: WordPress-Wikipedia-Widget