YOU SAID:

I wrote the song myself when I was in class 11. WRONG. “I wrote this song wrong."

INTO JAPANESE

11 年生のときに自分でこの曲を書きました。間違いです。「この曲は間違って書きました。」

BACK INTO ENGLISH

I wrote this song myself when I was in 11th grade. It's a mistake. "I wrote this song by mistake."

INTO JAPANESE

この曲は私が11年生のときに自分で書いたものです。間違いです。「この曲は間違って書いたんです。」

BACK INTO ENGLISH

I wrote this song myself when I was in 11th grade. It's a mistake. "I wrote this song by mistake."