/usr/share/man/fr/man8/mkfs.ext4dev.8.gz is in manpages-fr-extra 20151231.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/fr/man8/mke2fs.8.gz
/usr/share/man/fr/man8/mke2fs.8.gz