Standard packages from Fedora with some patches applied to support month names in dates in genitive case, as required by some European languages, mostly Slavic but also Greek, Finnish, and few more. Patches from BZ #10871 applied except backward compatibility, otherwise there would be no difference visible except the apps rebuilt from sources against this new glibc. Also it wouldn't be possible to backport to anything older than Fedora Rawhide.
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/rluzynski/genitive/