YOU SAID:

This is the song that never ends. It just goes on and on my friends. Someone started singing it, not knowing what it was. And now they can't stop singing it because...

INTO JAPANESE

これは、終わることのない曲です。それはちょうど私の友人と行きます。誰かは、それが何だったかわからない、それを歌い始めた。そして今彼らはので、それを歌っているを止めることはできない.

BACK INTO ENGLISH

This is the song that never ends. It will just go with my friends. Someone began singing it don't know what it was. And now they are so singing it can't stop.