New Zealand law states if your driver's licence or permit is not in English you must carry an accurate English translation or International Drivers licence that has been translated into English.
This is your responsibility as the hirer. A probationary or restricted licence is acceptable. See for more info 'Can I Use My Driving Licence in New Zealand?'.
Always bring your original/national driving license when picking up your campervan. An International Driver's Licence is just a translation. We'll need to see your original driving license so always make sure to upload that one via the Online Check-in Portal.