Man pages matching name umask in section 2:

umask.2.de	debian 10 / manpages-de-dev
umask.2.en	debian 10 / manpages-dev
umask.2.es	debian 10 / manpages-es
umask.2.it	debian 10 / manpages-it
umask.2.ja	debian 10 / manpages-ja-dev
umask.2.pl	debian 10 / manpages-pl-dev
umask.2.pt	debian 10 / manpages-pt-dev
umask.2.de	debian 11 / manpages-de-dev
umask.2.en	debian 11 / manpages-dev
umask.2.it	debian 11 / manpages-it-dev
umask.2.ja	debian 11 / manpages-ja-dev
umask.2.nl	debian 11 / manpages-nl-dev
umask.2.pt	debian 11 / manpages-pt-dev
umask.2.de	debian 12 / manpages-de-dev
umask.2.en	debian 12 / manpages-dev
umask.2.fr	debian 12 / manpages-fr-dev
umask.2.it	debian 12 / manpages-it-dev
umask.2.ja	debian 12 / manpages-ja-dev
umask.2.nl	debian 12 / manpages-nl-dev
umask.2.ru	debian 12 / manpages-ru-dev
umask.2.de	debian 13 / manpages-de-dev
umask.2.en	debian 13 / manpages-dev
umask.2.fr	debian 13 / manpages-fr-dev
umask.2.it	debian 13 / manpages-it-dev
umask.2.ja	debian 13 / manpages-ja-dev
umask.2.nl	debian 13 / manpages-nl-dev
umask.2.pl	debian 13 / manpages-pl-dev
umask.2.ro	debian 13 / manpages-ro-dev
umask.2.ru	debian 13 / manpages-ru-dev