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.

1 day ago|%count% days ago 1 dzień temu|%count% dni temu key: diff.ago.day 1 hour ago|%count% hours ago 1 godzinę temu|%count% godzin temu key: diff.ago.hour 1 minute ago|%count% minutes ago 1 minuta temu|%count% minut temu key: diff.ago.minute 1 month ago|%count% months ago 1 miesiąc temu |%count% miesięcy temu key: diff.ago.month 1 second ago|%count% seconds ago 1 sekunda temu|%count% sekund temu key: diff.ago.second 1 year ago|%count% years ago 1 rok temu|%count% lat temu key: diff.ago.year in 1 day|in %count% days za 1 godzinę|za %count% godzin key: diff.in.day in 1 hour|in %count% hours za 1 miesiąc|za %count% miesięcy key: diff.in.hour in 1 minute|in %count% minutes za 1 minutę|za %count% minut key: diff.in.minute in 1 month|in %count% months za 1 miesiąc|za %count% miesięcy key: diff.in.month in 1 second|in %count% seconds za 1 sekundę|za %count% sekund key: diff.in.second in 1 year|in %count% years za 1 rok| za %count% lat key: diff.in.year