Is it useful, though? Suppose someone enters "nonbinary". What is your Russian i18n team going to do?
Even in gendered language, you need to come up with some kind of "other" category, and you'll likely need to rewrite your sentences to make it work if you can make it work at all.
> Is it useful, though? Suppose someone enters "nonbinary". What is your Russian i18n team going to do?
No clue. But at least you have the data to use whenever you figure out what to do with it, and I imagine somebody tackled that question already, since this is not something that showed up yesterday.
In some languages like English you can go with "they" or such, in others there aren't good options that would be widely recognized. But that's just how i18n goes. Languages don't neatly align with the desires of computer programmers.
Even in gendered language, you need to come up with some kind of "other" category, and you'll likely need to rewrite your sentences to make it work if you can make it work at all.