AFAIK in Slavic languages you don't even have a cop-out like English "they" and the only way of expressing non-gendered pronoun is a neuter pronoun which has very strong dehumanizing connotations when applied to humans. So I think if it ever reaches Slavo-sphere they won't be as an easy solution as using they/them in English, unless the English solution would be just copycatted - which is quite alien to Slavic languages but I guess learning newspeak would require to give up on oldthink.