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.

Custom range Własny zakres key: date_period_choice.custom_range Last month Ostatni miesiąc key: date_period_choice.last_month Last week Ostatni tydzień key: date_period_choice.last_week Last year Ostatni rok key: date_period_choice.last_year