/usr/share/gosa/locale/plugins/ is in gosa-plugin-systems 2.7.4+reloaded2-13+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gosa/locale/plugins/systems/
/usr/share/gosa/locale/plugins/systems/locale/
/usr/share/gosa/locale/plugins/systems/locale/de/
/usr/share/gosa/locale/plugins/systems/locale/de/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/de/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/en/
/usr/share/gosa/locale/plugins/systems/locale/en/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/en/LC_MESSAGES/.placeholder
/usr/share/gosa/locale/plugins/systems/locale/es/
/usr/share/gosa/locale/plugins/systems/locale/es/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/es/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/fr/
/usr/share/gosa/locale/plugins/systems/locale/fr/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/fr/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/it/
/usr/share/gosa/locale/plugins/systems/locale/it/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/it/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/messages.po
/usr/share/gosa/locale/plugins/systems/locale/nl/
/usr/share/gosa/locale/plugins/systems/locale/nl/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/nl/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/pl/
/usr/share/gosa/locale/plugins/systems/locale/pl/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/pl/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/pt_BR/
/usr/share/gosa/locale/plugins/systems/locale/pt_BR/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/pt_BR/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/ru/
/usr/share/gosa/locale/plugins/systems/locale/ru/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/ru/LC_MESSAGES/messages.po
/usr/share/gosa/locale/plugins/systems/locale/zh/
/usr/share/gosa/locale/plugins/systems/locale/zh/LC_MESSAGES/
/usr/share/gosa/locale/plugins/systems/locale/zh/LC_MESSAGES/messages.po