Board Thread:Support Requests - Community Management/@comment-24157665-20160414111951/@comment-26143371-20160414135731

If you look at the interwiki link-map of CC, you will see that there are several wikis on it which aren't hosted on Wikia: http://community.wikia.com/api.php?action=query&meta=siteinfo&siprop=interwikimap

Many of the external ones are related to MediaWiki/Wikipedia, but there are also others (e.g. imdb:). I doubt they add them on request, but you can always contact staff via C and ask.