Man pages matching name sane-cardscan in section 5:

sane-cardscan.5.en	debian 10 / libsane-common
sane-cardscan.5.en	debian 11 / libsane-common
sane-cardscan.5.de	debian 11 / manpages-de
sane-cardscan.5.en	debian 12 / libsane-common
sane-cardscan.5.de	debian 12 / manpages-de