Growing up in Germany and not understanding any other language when I was young I used to believe that the "Long Vehicle" signs on lorries meant that that was the country they were actually coming from.
A childhood belief about foreign languages

others believed things like this
- I used to believe gibberish was a real language from a country from gibberland — Kelly Bulanek
- I used to think that growing pains meant that a tomato plant was growing in your stomach.— Annette
- When I was a kid, I used to believe that the "ped x-ing" signs meant "pediatrician crossing."— Jessica
- I thought the "To Let" signs on buildings meant they were public toilets.— Scottish Laddie
- i used to believe that the no outlet signs meant that noone in that section of the street had electricityAnon
- I used to think that "No standing signs" meant that you weren't allowed to actually stand in the area!Anon