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.

Creating Tworzenie key: creating under %location_name% in %language% w lokalizacji %location_name%, w języku %language% key: editing_details New %contentType% Nowy %contentType% key: new_content_item Cancel Anuluj key: on_the_fly.cancel Confirm Zatwierdź key: on_the_fly.confirm