A lot of the attempts at this for English before the 2000s failed because they didn't integrate well with the rest of the language, and I think the elegant solu

A lot of the attempts at this for English before the 2000s failed because they didn't integrate well with the rest of the language, and I think the elegant solution for each language will depend on details of that language. For Spanish I think I think -e is solid: https://www.jefftk.com/p/ungendered-spanish https://www.jefftk.com/p/ungendered-spanish Note that you don't need to fully remove grammatical gender to get this benefit, just change the default way of talking about humans.