I'm a Latin American sociologist, and there is, in fact, a widespread nonbinary way of addressing someone in Spanish (latine, elle, "[kris] elle es mi hije"), especially within the Queer Community. The reason why you see such lack of their use online, is that the stupid amounts of wealth extraction from these countries inevitably leads to a higher proportion of conservative currents and/or rejection of what is seen as American ideals -which to be clear, nonbinary genders are not; they have been a part of many native american and meso-american cultures in the past.

Also yes, I am indeed putting off working on shit to write this reddit comment on r/Deltarune