When I was 7 years old, my French teacher would sometimes play her guitar and sing a song with French words to us. I always thought she was just making up words and that the song was just gibberish.
My French teacher would tell me that those are real French words, but I didn't believe her. I also thought that "Madame" was not a real word and was just part of her "made-up language". She would get upset a lot.
A childhood belief about foreign languages

others believed things like this
- I used to believe that french kiss was something coming from France, and that only the French did it— Sasha
- I used to think that you had to be french to really taste french fries.— Not French;)
- I used to believe that french fries were made of bread.— tendersoul
- I thought french fries were really invented in France (they are Belgian for those who don't know)— Quarm
- When I was young I thought that police had soft skin, because this is how it sounds in French " Peau lisse "
— amine - i used to think that french was english backwards!— ---pepsi---