Man pages matching name undocumented in section 3:

undocumented.3.de	debian 10 / manpages-de-dev
undocumented.3.en	debian 10 / manpages-dev
undocumented.3.es	debian 10 / manpages-es
undocumented.3.it	debian 10 / manpages-it
undocumented.3.ja	debian 10 / manpages-ja-dev
undocumented.3.pl	debian 10 / manpages-pl-dev
undocumented.3.pt	debian 10 / manpages-pt-dev
undocumented.3.de	debian 11 / manpages-de-dev
undocumented.3.en	debian 11 / manpages-dev
undocumented.3.es	debian 11 / manpages-es-dev
undocumented.3.fr	debian 11 / manpages-fr-dev
undocumented.3.it	debian 11 / manpages-it-dev
undocumented.3.ja	debian 11 / manpages-ja-dev
undocumented.3.pl	debian 11 / manpages-pl-dev
undocumented.3.pt	debian 11 / manpages-pt-dev
undocumented.3.de	debian 12 / manpages-de-dev
undocumented.3.en	debian 12 / manpages-dev
undocumented.3.es	debian 12 / manpages-es-dev
undocumented.3.fr	debian 12 / manpages-fr-dev
undocumented.3.it	debian 12 / manpages-it-dev
undocumented.3.ja	debian 12 / manpages-ja-dev
undocumented.3.pl	debian 12 / manpages-pl-dev