Yes, if it isn't in English. INZ asks for a certified English translation of every non-English document in a residence application, and for visitor visas it asks for a full English translation by someone other than you, your family or your immigration adviser.
INZ doesn't translate documents itself, and it won't accept a translation made by the applicant, a relative or the adviser helping with the application. What it wants is a translation certified as correct by someone competent in both languages, signed or stamped by the translator or translation business, and on the business's letterhead where possible. You submit it together with a copy of the original certificate, so the case officer can check one against the other.
Ours are prepared by professional translators working to ISO 17100, then checked before delivery. The translation follows the layout of the original, boxes and all, so a case officer comparing the two isn't left playing spot-the-difference with a registry form from 1987.