I presume you want an answer based on ‘raw’ knowledge, that is, without looking up on the internet. Latin has been a dead language for a long time. I think even during the Roman empire, classical Latin was a language that only the educated elite spoke, and even they probably spoke in their own dialects at home.
It really depends on where you want to draw the line between classical Latin and vulgar dialects, but classical Latin as we know it has not been spoken as a native language for at least 2000 years. I’m quite sure the language spoken in Roman marketplaces was quite different from what 19th century classics professors would present their obscure papers in.
This is a common myth, and like so many myths, it’s not even true.
but classical Latin as we know it has not been spoken as a native language for at least 2000 years.
Incredible as it sounds, Latin lived as a native language into the 20th Century! He was born in Budapest, Hungary about 100 years before, maybe in 1836 or thereabouts. He was born into a very upper class, elite family, possibly with connections to Royalty. His family actually spoke Latin and the principal language of the home! So he was raised speaking Latin. Latin was his first language, and while he did learn a couple of other languages, Hungarian and maybe German, but Latin was the language that he was always most comfortable in. He said that his situation was not unusual among the class that he was born into.
At that time, Latin was widely spoken at least as a 2nd language. In earlier post, I pointed out that Latin was actually the official language of the Croatian Parliament until 1846!
He later moved to the US where of course he become a Classics Professor who specialiazed in teaching Latin at one of America’s most elite universities, possibly Harvard or Yale.
He died in 1936. I found his obituary and I believe it said he died when he was around 100 years old.
Latin lived as a native language until the 1930’s!