How well could you manage if you were transported back in time?

How many dead languages do you know? Well enough to understand when
spoken? Well enough to speak? Can you start a fire? Have you skills
which would be in demand in Imperial Rome, or Medieval France?

I think this thought train was set in motion by a book of Latin
phrases suitable for modern use, which I received yesterday. That got
me thinking about the [Latin for Americans][] books I got a couple
years ago—I’ve hardly started working with them. For that matter,
my French is rusted to pieces, my Spanish was never any good, and I
have no idea how to parse Chinese, Japanese, or Hindi—written,
spoken, or beaten-with-the-book-over-the-head makes no difference.

This seems like a poor state of affairs—there are so many people I
can’t talk to!

But, anyway, the result of my imagined trip to Imperial Rome

Roman Guard, in Latin: Hey! Tall woman inappropriately dressed for
the climate! What are you doing here?

Me: Brittania est insula.

Roman Guard, still in Latin: Apparently, giving geography
lessons. Where are you going?

Me: Roma est in Italia. Italia est peninsula.

Roman Guard, frustrated: I know Rome is in Italy. I’m a Roman.
And stop with the geography. Okay, you’re a badly-dressed Briton
barbarian, headed for Rome. What are you going to do in Rome?

Me: Agricola est.

Roman Guard: Aha! You got hit in the head with farm equipment.

Me: Alumna est.

Roman Guard: And now you’re going to be a student?

Me, frustrated: mea culpa, non est miles.

Roman Guard: Guilty of what? And I am so a soldier! I’m going to
have to take you downtown.

And, that, I think, would be how I ended up in jail my first day in Rome.