I think age of accountability is different for each individual.
I know my own age of accountability. I was 11 years old when I reached it.
I knowingly said a bad word, it wasn't even the worst, but all of a sudden, I felt the world change around me like the floor under me fell out. I had a terrible sinking feeling that I said something bad.
Fortunately, I started seeking God when I was 16 and got saved when I was 17.

I know my own age of accountability. I was 11 years old when I reached it.
I knowingly said a bad word, it wasn't even the worst, but all of a sudden, I felt the world change around me like the floor under me fell out. I had a terrible sinking feeling that I said something bad.
Fortunately, I started seeking God when I was 16 and got saved when I was 17.