Until i was in high school I always thought that sign-language was a language that was spoken (or signed) in a country some where, and that's what all spoke (signed). I always wondered how they got the attention of people that weren't looking.
A childhood belief about foreign languages

others believed things like this
- I used to think that adults spoke an entirely different language (not English) when kids weren't around. — Swordfish
- I used to believe that if I spoke with whatever accent a language was in, I was speaking that language...— Renae
- I used to believe that, no matter what language other people spoke, that everyone thought in EnglishAnon
- When I was little I used to believe that URDU is the most spoken language in the world Anon
- When I was little, I used to think that Latin was wriiten because it wasn't a spoken language!!!— Stupid Gal
- For the longest time I thought Pig Latin was an actual language that they spoke in a part of Europe.Anon