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.

Enter login or email Podaj login lub e-mail key: Enter login or email Enter password Podaj hasło key: Enter password Login Zaloguj się key: Login Password: Hasło: key: Password: Username: Nazwa użytkownika: key: Username: