In fact, i think we should have all “areas” used by labels and/or distributors. Benelux is clearly one of those.
For any release having textual content, languages and scripts may determine the distribution area. Same goes for cover art and possible rules/censorship.
The main point here is to provide good enough information to editors and users, if a distributor says the release is/was available in area X, i think it makes sense for us to just use area X, until we have more precise information (which may never happen), rather than dropping the info we have because it isn’t 100% accurate by our current standards.
That’s something bothering me with dates too, and i’m not alone, one may know a band was founded around 2000, but at the moment, you can’t enter this information if you don’t have the exact year, because we don’t have circa.
And that’s bad, because even though the information is a bit fuzzy, it isn’t false, can be proven, and is still useful to editors and users.