Language <-> Country mapping

[Vampire]

Hi, it would be nice to have some "Language <-> Country" mapping.
Optimally both would be a collection, "Language is spoken in this list of countries" and "Country has these languages used" and for each also one main mapping, either separately or by convention as first entry in the returned list. This would be like "if you want to show a flag for this language, then use the flag of country X" and "if you want a default language decision for country x, use this language".