YOU SAID:

their mistake is they got old that is not a mistake we'll be making no sir we'll stay young forever

INTO JAPANESE

彼らの間違いは、彼らが古くなったことです。間違いではありません。

BACK INTO ENGLISH

Their mistake is that they got old. It is not a mistake.

INTO JAPANESE

彼らの間違いは彼らが年を取ったことです。間違いではありません。

BACK INTO ENGLISH

Their mistake is that they got older. It is not a mistake.

INTO JAPANESE

彼らの間違いは、彼らが年を取ったことです。間違いではありません。

BACK INTO ENGLISH

Their mistake is that they got older. It is not a mistake.