ما حكم استخدام كلمة (جنس) في العربية؟

If the intention is to inquire about the ruling on using the word "al-jins" (gender/type) as a euphemism for sexual intercourse, then there is no sharia impediment to that. Euphemism is a linguistic style used in Islamic law, especially for matters that are embarrassing to mention explicitly. If the question is about the meaning of the word itself, then in Arabic, "al-jins" refers to a category or a kind of anything, and it is broader than "al-naw'" (species/type).