/usr/share/icingaweb2/modules/monitoring/application/locale/ is in icingaweb2-module-monitoring 2.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/icingaweb2/modules/monitoring/application/locale/de_DE/
/usr/share/icingaweb2/modules/monitoring/application/locale/de_DE/LC_MESSAGES/
/usr/share/icingaweb2/modules/monitoring/application/locale/de_DE/LC_MESSAGES/monitoring.mo
/usr/share/icingaweb2/modules/monitoring/application/locale/de_DE/LC_MESSAGES/monitoring.po
/usr/share/icingaweb2/modules/monitoring/application/locale/it_IT/
/usr/share/icingaweb2/modules/monitoring/application/locale/it_IT/LC_MESSAGES/
/usr/share/icingaweb2/modules/monitoring/application/locale/it_IT/LC_MESSAGES/monitoring.mo
/usr/share/icingaweb2/modules/monitoring/application/locale/it_IT/LC_MESSAGES/monitoring.po
/usr/share/icingaweb2/modules/monitoring/application/locale/pt_BR/
/usr/share/icingaweb2/modules/monitoring/application/locale/pt_BR/LC_MESSAGES/
/usr/share/icingaweb2/modules/monitoring/application/locale/pt_BR/LC_MESSAGES/monitoring.mo
/usr/share/icingaweb2/modules/monitoring/application/locale/pt_BR/LC_MESSAGES/monitoring.po
/usr/share/icingaweb2/modules/monitoring/application/locale/ru_RU/
/usr/share/icingaweb2/modules/monitoring/application/locale/ru_RU/LC_MESSAGES/
/usr/share/icingaweb2/modules/monitoring/application/locale/ru_RU/LC_MESSAGES/monitoring.po