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Pythagoras' Law?
(lemm.ee)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
We can't know for certain, since no audio recordings exist for obvious reasons, and we'd need a time machine to find a fluent, native speaker we can be confident is using period-correct pronunciations.
We can make educated guesses though, by deconstructing existing descendent languages and tracing back commonalities.
Here's what we've got so far:
https://youtu.be/5NB2Z6pZBNA
Also worthy of note that this sort of writing would've been distinct from daily commoner chit-chat, which would probably be more recognizable to us. Not sure how much of that got recorded and survived through the years though.