Adding my thanks, @Ragesoss and @TFlanagan-WMF ! Might also make sense to update this documentation: https://meta.wikimedia.org/wiki/Programs_%26_Events_Dashboard/Using_the_Dashboard (that's where I was looking and got the impression that all languages should be automagically pulled in!). Anyway, glad to understand this better now, and someday look forward to the fuller solution (dropdown list - I really didn't want to choose just English).

Thanks for the CC @Halfak, I'm watching this from my active volunteer account now too. We're hoping to use this for a few projects on English Wikipedia now, and several other languages in coming months, so looking forward to seeing progress soon!