I used to think that people in the middle ages spoke in rhymes (like that scene in the 'Princess Bride'). I must have caught a glimpse of Romeo & Juliet or some Shakespearean movie and thought that Shakespeare's wrote dialogue as poetry because that's the way people actually spoke back in the day.
A childhood belief about history

others believed things like this
- I thought that people who spoke a different languages were aliens.— Phoebe
- I used to believe that, no matter what language other people spoke, that everyone thought in EnglishAnon
- I used to think that people from the Netherlands spoke NethishAnon
- I used to wonder why people didn't use his first name when they spoke of McJagger of the Rolling Stones.— silly me
- Since Germans speak German, I thought Jewish people spoke Jewish.— Lori
- I used to think that even people who spoke something other than English, thought in English— Peaches