YOU SAID:
my cat is the cutest thing in the whole world
INTO JAPANESE
私の猫は全世界で一番かわいい
BACK INTO ENGLISH
my cat is the cutest in the whole world
INTO JAPANESE
私の猫は全世界で一番かわいいです
BACK INTO ENGLISH
my cat is the cutest in the whole world
You've done this before, haven't you.