YOU SAID:

My cat is the cutest cat in this earthly realm.

INTO JAPANESE

私の猫は、この世の世界でもっとも美しい猫です。

BACK INTO ENGLISH

My cat is the most beautiful cat in this world.

INTO JAPANESE

私の猫はこの世界で最も美しい猫です。

BACK INTO ENGLISH

My cat is the most beautiful cat in this world.