First, I mean citizens of the Roman Empire, not modern residents of the city of Rome., and definitely not citizens of the Byzantine Empire or Holy Roman Empire.
Romans, I have a serious complaint with you! Specifically, your Latin language. More specifically, the word "dum" which means either "while" or "until" depending on context.
"While" and "until" are opposites, Romans! Seriously, it's embarassing. "Until" means "stop when this becomes true," and "while" means "stop when this becomes untrue." How can you have the same word for both? How dare you have the same word for both? It's just embarassing.
Worse yet, your mistake got copied into Esperanto, which borrowed the word. It is otherwise a language of pure logic. And you spoiled it! Think of poor Zamenhoff!
You may defend it. You may say that the meaning is clear by context. Context is a crutch! Context is what you use when something goes wrong in communication. Like, say, the use of the same word for opposite meanings.
Fix the meaning of the word "dum" immediately! I mean it. Otherwise, your whole Empire is in peril of collapse.
I hope this gets to you in time.
P.S. Thanks for the arch.