YOU SAID:

Some day when we are wiser and the world's older

INTO JAPANESE

私たちが賢くて世界が年をとったいつの日か

BACK INTO ENGLISH

Someday when we are smart and the world is old

INTO JAPANESE

いつか私たちが賢くて世界が古いとき

BACK INTO ENGLISH

Someday when we are smart and the world is old