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.

Settings Ustawienia key: customer_portal__account_settings My Profile Mój Profil key: customer_portal__account_settings__my_profile Dashboard Pulpit key: customer_portal__dashboard Order Management Zarządzanie zamówieniami key: customer_portal__order_management Past Orders Past Orders key: customer_portal__order_management__past_orders Pending Orders Pending Orders key: customer_portal__order_management__pending_orders Organization Organizacja key: customer_portal__organization Address Book Książka adresowa key: customer_portal__organization__address_book Contact Contact key: customer_portal__organization__contact Members Członkowie key: customer_portal__organization__members Corporate Corporate key: main__content__corporateaccount Customers Klienci key: main__corporateaccount Applications Wnioski key: main__corporateaccount__applications Companies Firmy key: main__corporateaccount__companies B2B types B2B types key: main__corporateaccount__content_types Clients Klienci key: main__corporateaccount__individuals Settings Ustawienia key: main__corporateaccount__settings