Ü is alt+666
It's
so easy to remember, I don't know why people don't use it.
Yeah, the word itself is fine, but it looks out of place, it's used in place of another word which is commonly seen (Terran -> it's even in the name of the GTVA), not to mention people
think it's a mistake at first glance. That's definitely not good. You can't expect everyone to just know archaic words like that, nor can you expect them to bother looking it up.
That leaves the question - why does it have to be that particular word? I'm sure there are other words you could use to provide a nod to other languages (if you really wanted that),
without breaking consistency and worst of all making it look like a mistake!
And it's Temeraire.