> This is English speaking folks that have adopted a Spanish word and are now making it gender neutral by skipping the last letter. They are under no obligation to continue to follow the the original language's grammar.

Don’t you see how that makes it worse? The English word-Latin—is already gender neutral! Americans adopted “Latino” as gesture to the large number of Spanish speakers living in America. It’s not just a borrowed word Americans happen to use, it’s a word used to refer to a large Spanish-speaking minority group living in the country.