In countries where same sex marriages are possible, does the marriage certificate list one of the two persons as husband or male and the other as wife or female?
In Thailand, where currently only marriage of a man and a woman are allowed, the KR.2 lists one person as male (ชาย), the other as female (หญิง)
Source: https://fiverr-res.cloudinary.com/images/q_auto,f_auto/gigs2/122644347/original/6e34572d6f4dc905474f4e6d2f884a7176e6fe5b/translate-marriage-certificate-from-thai-to-english-for-you.jpg