Man pages matching name __setfpucw in section 3:

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