/usr/share/hunspell/de_CH.aff is in hunspell-de-ch-frami 1:5.1.0-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/hunspell/de_CH_frami.aff
/usr/share/hunspell/de_CH_frami.aff