The source node in most cases contains the sample message as written by the developer. If it looks like a dot-delimitted string such as "form.label.firstname", then the developer has not provided a default message.

Activity Log Dziennik Aktywności key: role.policy.activity_log Activity Log / All Functions Dziennik aktywności / wszystkie funkcje key: role.policy.activity_log.all_functions Activity Log / Read Dziennik aktywności / Czytanie key: role.policy.activity_log.read