Man pages matching name groff_char in section 7:

groff_char.7.en	debian 10 / groff
groff_char.7.ja	debian 10 / manpages-ja
groff_char.7.en	debian 11 / groff
groff_char.7.ja	debian 11 / manpages-ja
groff_char.7.en	debian 12 / groff
groff_char.7.ja	debian 12 / manpages-ja