I'm still going to use they/them because a name doesn't necessarily match with one's gender.
language 2 embeds gender in the word itself.
names are words.
it's a lose-lose situation: native speakers of language 2 will look at what you wrote and cringe or just assume you're ignorant. they won't get the point you're trying to make, null, nada, 0% chance. source: i'm a native speaker of language 2.
You can talk about someone at length without mentioning their gender once.