The question is Would a general Languages.SE supersite (synchronized with the current language sites) be feasible?, but it was deleted and the timeline says:
It thus appears to be an automated deletion (similar to this question), so I guess it happened because the question links to a bunch of unsuccessful sites, and one of them was deleted.
Question: Can we undelete the Languages.SE idea please?
I'm still interested in exploring this idea. However, if it is a case of "don't bother" (for whatever reason, which it very well may be), it's probably best I don't put too much time towards it.