I offer you Indonesian, which has a word for “he/she/they/it” (dia) but no words for “he” or “she”. Indonesian has words for older sibling (kakak) and younger sibling (adik) but it’s rare to specify the sibling’s gender. It ever has rude slang for “primary reproductive organ” (titis, among many others) without specifying wether it concerns a vagina or penis. TL;DR Indonesia is based.