Most likely you’d spread some diseases that we’re all immune. You wouldn’t even explain how did you get there and that you’re not a heretic due to the language barrier, so probably end up burned alive or something.

A pale, well clean and curated guy with strange dresses (rich) who show up suddenly alone with no luggage or horse (alone), talking some foreign language (stranger).

Depending from the periods and the location, the two more likely scenario would be either to be robbed and killed/sold-as-slave or be arrested and put in a jail for interrogation.

Dr. Stone entered the chat

“So here’s a bunch of really cool stuff you can do once you have better steel”

“How do we make that”

“Fuck if I know, I’m an engineer not a chemist. But if you get one here’s a cool thing you can do with plastic called injection molding, it’ll poison your water though”

Bold of you to assume you’d go anywhere speaking only modern day English

Do not tell me what to do 😡

Nate Bargatze had a pretty good joke about the same premise:

https://youtu.be/QXy3uII-xn0

“Oh, none of you speak English. Fuck.”

Best chance pretend to be a mute and blend in the best you can. Gonna be a bit hard to keep the glasses if you are dependent on them, maybe just become good at making glasses seems like a good trade especially for the time period I dont think glasses were really around for awhile I’ll have to do some research