Man pages matching name iswdigit in section 3:

iswdigit.3.en	debian 10 / manpages-dev
iswdigit.3.es	debian 10 / manpages-es
iswdigit.3.ja	debian 10 / manpages-ja-dev
iswdigit.3.pt	debian 10 / manpages-pt-dev
iswdigit.3.en	debian 11 / manpages-dev
iswdigit.3.es	debian 11 / manpages-es-dev
iswdigit.3.fr	debian 11 / manpages-fr-dev
iswdigit.3.ja	debian 11 / manpages-ja-dev
iswdigit.3.pt	debian 11 / manpages-pt-dev
iswdigit.3.en	debian 12 / manpages-dev
iswdigit.3.es	debian 12 / manpages-es-dev
iswdigit.3.fr	debian 12 / manpages-fr-dev
iswdigit.3.ja	debian 12 / manpages-ja-dev
iswdigit.3.pt_BR	debian 12 / manpages-pt-br-dev
iswdigit.3.ru	debian 12 / manpages-ru-dev