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.

Invalid invitation status Ungültiger Einladungsstatus key: ibexa.collaboration.invalid.status Invalid participant type: "%type%". Allowed types are %allowed_types%. Ungültiger Teilnehmertyp: „%type%“. Zulässige Typen sind %allowed_types%. key: ibexa.collaboration.participant.type Session token must be unique Sitzungs-Token muss eindeutig sein key: ibexa.collaboration.token.unique