I want to advertise StackExchange at a language-learning-related web, so it would be handy to provide a link to all language sites here. Or to all language-related ones, at best, but list of languages you can ask about would be enough. The categories used here are broader, so the closest category search I already found shows a lot of clutter. Search for word "language" should be better, but I didn't find any custom search at the site list (perhaps it's possible programatically, I don't know). I already tried to search for "language" at Area51, but even though I had "beta" tab active, proposals at all stages (mostly "definition") were shown.
Can I list the language sites some other way, or do I have to provide all the links one at a time, or let the people try to find the needle (language sites) in the haystack (all sites)?