Illi et Greta Thunberg in urbes sunt
Why not "salvant"? Because it is late Latin? A wider question: Where should the boundary between acceptable and not acceptable be? The death of Cicero? The death of Augustus? The end of antiquity?
There isn't a hard and fast boundary date between the two.
It is a truth universally acknowledged, that anything after the settlement of California is unacceptable.
Note how civitas Tasmania never gets mentioned; likewise urbs Wellingtonia. :)
That first half dozen words gives me horrible flashbacks, P&PTSD (pride and prejudice traumatic stress disorder).
True enough, but it would be useful to have some sort of guidance to what before the settlement of California is acceptable.
It accepted 'servat' saying I had a typo in my answer...
The course contributors have no control over what counts as a typo vs an error.