It started among LGBT Hispanic people. Probably influenced by folx.
Latine seems to be more popular outside North America. Probably it will replace Latinx eventually.
In Spanish? I’m having a hard time imagining how a word in Spanish would sound with an “X” at the end. “Latine” seems easily pronounceable but I’m not sure what the point of adding the “e” is. It’s not like that vowel signals gender neutrality in any consistent manner in Romance languages.
Also in Latin(American) includes Portuguese and French speakers. Limit it to Spanish language/culture/heritage would be Hispanicx, which is also nonsensical, especially because I just made it up.
But I'm just a person who speaks Spanish, French and Portuguese, so take my word with a grain of salt.
Nothing signals gender neutrality. That's why people made something up. e is a simple replacement for a and o and sounds more natural than i or u.
Aren't we grafting what's, at its roots, a germanic construction onto a latin-based word? It makes absolutely no sense to me.