Man pages matching name cfsetispeed in section 3:

cfsetispeed.3.en	debian 10 / manpages-dev
cfsetispeed.3.es	debian 10 / manpages-es
cfsetispeed.3.ja	debian 10 / manpages-ja-dev
cfsetispeed.3.en	debian 11 / manpages-dev
cfsetispeed.3.fr	debian 11 / manpages-fr-dev
cfsetispeed.3.ja	debian 11 / manpages-ja-dev
cfsetispeed.3.en	debian 12 / manpages-dev
cfsetispeed.3.ja	debian 12 / manpages-ja-dev
cfsetispeed.3.ru	debian 12 / manpages-ru-dev