I thought that Korean and Japanese sounded the same.
A childhood belief about foreign languages

others believed things like this
- i used to believe that i am american.
i am japanese . — mayumi - My older brother made me believe that wristwatches were powered by tiny Japanese men inside them.— Outsider
- i used to think that when i turned 5 i would become a boy because 5 sounded like a boy age.Anon
- I used to think Monserrat sounded like monster rat.Anon
- I used to think that prostitutes were female lawyers. It just sounded so official...— MC
- I used to call the rays of light from the sun "sun BEANS". That's what it sounded like to me.Anon