YOU SAID:

You are just the most wonderfullest nicest person

INTO JAPANESE

あなたはただ最も素晴らしい、最も素敵な人です

BACK INTO ENGLISH

you're just the best, the nicest person

INTO JAPANESE

あなたはただ最高の、最高にいい人です

BACK INTO ENGLISH

you're just the best, the nicest person