There is a typo in od's --help output: https://translationproject.org/latest/coreutils/fr.po
This is erroneous: (the short-named "-s" should be "-S"): " -s, --strings[=BYTES] affiche les ... i.e., " -S, --strings[=BYTES] affiche les ...
This was reported in https://bugs.launchpad.net/bugs/784758
Thank you,
Jim