I aim to have the same kind of granularity in L'ewa. As a goal of the language, I should be able to point to any content word in the dictionary and be able to say “that's my gender” in the same way I can describe color or music with that tree. These will implicitly be metaphors (which does detract a bit from the logical stance L'ewa normally takes) because gender is almost always a metaphor in practice. L'ewa will not have binary gender.
this is mst3k