gettext needs libappstream-glib-devel to extract correctly AppData files
As reported here, GNOME apps don't have release notes translated because Damned Lies is missing the file /usr/share/gettext/its/appdata.its
provided by the package libappstream-glib-devel
(in Fedora).
Please add it so we can see translated strings in applications which can use them, as GNOME Software.