YOU SAID:

only thing that's burning when the nights grow old

INTO JAPANESE

夜が年を取ったときに燃えているものだけ

BACK INTO ENGLISH

It's only burning when the night is old.

INTO JAPANESE

夜が古いときだけ燃えている。

BACK INTO ENGLISH

It burns only when the night is old.

INTO JAPANESE

夜が古いときだけ燃える。

BACK INTO ENGLISH

It burns only when the night is old.