fc-cache -fv
https://forum.ubuntu-ir.org/index.php?topic=158424.msg1250745#new
fc-list -f '%{family}\n' | sort -u | grep -i 'Vazir'cat ~/.config/fontconfig/conf.d/30-persian-arabic.conffc-match 'sans-serif:lang=fa'
fc-match 'sans-serif:lang=ar'چیه؟