The quick or short Language Questions Thread (not grammar)

[NicoleIsEnough]

There was a question about that a while ago, maybe the answers already help you?

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I feel like I should be able to find this in a search but I am failing. My son is writing a paragraph in Japanese about his family. How would he refer to his older nonbinary sibling? Normally he would say, “I have an older brother/sister.” Followed by their name, age, grade in school, etc. Would just using kyoodai work?