/etc/fonts/ is in language-selector-common 0.188.
This file is owned by root:root, with mode 0o755.
..
/etc/fonts/conf.avail/
/etc/fonts/conf.avail/30-cjk-aliases.conf
/etc/fonts/conf.avail/64-language-selector-prefer.conf
/etc/fonts/conf.avail/69-language-selector-ja.conf
/etc/fonts/conf.avail/69-language-selector-zh-cn.conf
/etc/fonts/conf.avail/69-language-selector-zh-hk.conf
/etc/fonts/conf.avail/69-language-selector-zh-mo.conf
/etc/fonts/conf.avail/69-language-selector-zh-sg.conf
/etc/fonts/conf.avail/69-language-selector-zh-tw.conf
/etc/fonts/conf.avail/99-language-selector-zh.conf
/etc/fonts/conf.d/
/etc/fonts/conf.d/30-cjk-aliases.conf
/etc/fonts/conf.d/64-language-selector-prefer.conf
/etc/fonts/conf.d/69-language-selector-ja.conf
/etc/fonts/conf.d/69-language-selector-zh-cn.conf
/etc/fonts/conf.d/69-language-selector-zh-hk.conf
/etc/fonts/conf.d/69-language-selector-zh-mo.conf
/etc/fonts/conf.d/69-language-selector-zh-sg.conf
/etc/fonts/conf.d/69-language-selector-zh-tw.conf
/etc/fonts/conf.d/99-language-selector-zh.conf