I used to beleive that you could change words from English to French just by changing the same letters every time, like it was a simple formula. (e.g. every 'a' in English would be 'h' in French or something).
A childhood belief about foreign languages

others believed things like this
- i used to think that french was english backwards!— ---pepsi---
- I used to believe that french kiss was something coming from France, and that only the French did it— Sasha
- I use to beleive that because oui (which sounds exactly like wee) mean yes in french, that poo meant no.— Toby
- I used to think that you had to be french to really taste french fries.— Not French;)
- I used to think that even people who spoke something other than English, thought in English— Peaches
- I used to believe that if I spelled Norwegian words backwards, it would be English. I don't anymore...— Gudrun