/usr/share/help/cs/ is in gnome-dictionary 3.20.0-3+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/help/cs/gnome-dictionary/
/usr/share/help/cs/gnome-dictionary/definition.page
/usr/share/help/cs/gnome-dictionary/dictionary-select.page
/usr/share/help/cs/gnome-dictionary/figures/
/usr/share/help/cs/gnome-dictionary/figures/gnome-dictionary-icon.png
/usr/share/help/cs/gnome-dictionary/figures/gnome-dictionary.png
/usr/share/help/cs/gnome-dictionary/find.page
/usr/share/help/cs/gnome-dictionary/index.page
/usr/share/help/cs/gnome-dictionary/introduction.page
/usr/share/help/cs/gnome-dictionary/keyboard-shortcuts.page
/usr/share/help/cs/gnome-dictionary/legal.xml
/usr/share/help/cs/gnome-dictionary/pref.page
/usr/share/help/cs/gnome-dictionary/print-font.page
/usr/share/help/cs/gnome-dictionary/print.page
/usr/share/help/cs/gnome-dictionary/prob-retrieving-definition.page
/usr/share/help/cs/gnome-dictionary/save-definition.page
/usr/share/help/cs/gnome-dictionary/similar-words.page
/usr/share/help/cs/gnome-dictionary/source-add-local.page
/usr/share/help/cs/gnome-dictionary/sources-default.page
/usr/share/help/cs/gnome-dictionary/sources-delete.page
/usr/share/help/cs/gnome-dictionary/sources-edit.page
/usr/share/help/cs/gnome-dictionary/sources-select.page
/usr/share/help/cs/gnome-dictionary/sources.page
/usr/share/help/cs/gnome-dictionary/text-copy.page