Yes, if it isn't entirely in English. Home Affairs asks for an English translation of every non-English document, uploaded alongside a colour scan of the original.
For married applicants, the marriage certificate is the formal proof that the relationship exists in law. Home Affairs still assesses the relationship as a whole, but the certificate is where the case officer starts, so it should be complete: names, dates, places, witnesses, the officiant, the registration number and every stamp on the page.
Our translations follow the layout of the original so the case officer can match each line to its source without squinting. Every certificate stamp gets translated too, which in some countries means more stamps than signatures (the paperwork equivalent of a well-attended wedding).