When the author has a bilingual name, write it in the order that it is on the document. Add a hyphen (-) between the two languages.
Ministry of Education−Te Tāhuhu o Te Mātauranga. (2015). The New Zealand curriculum for English-medium teaching and learning in years 1-13. https://nzcurriculum.tki.porg.nz/content/downlaond/1108/11989/file/New%20Zealand%20
Curriculum%20Web.pdf
When the title has a bilingual name, write it in the order that it is on the document. Add a slash (/) between the two languages.
Ministry of Education. (1996). Te Whāriki: He Whāriki Mātauranga mō ngā Mokopuna o Aotearoa/Early childhood curriculum (Item 02980). Learning Media. https://www.education.govt.nz/assets/Documents/Early-Childhood/Te-Whariki-1996.pdf
For a bilingual author, include both names, e.g. (Ministry of Education−Te Tāhuhu o Te Mātauranga, 2015).