Airblader [1] filed a deletion request for regionset-de [2]:
Upstream does not seem to exist anymore.
[1] https://aur.archlinux.org/account/Airblader/ [2] https://aur.archlinux.org/pkgbase/regionset-de/
Request #3440 has been accepted by Kyrias [1].
aur-requests@lists.archlinux.org