YOU SAID:

The one who is the one who is the one who is my teacher is the nicest person in the world

INTO JAPANESE

私の先生である人は世界で最も素晴らしい人です

BACK INTO ENGLISH

The person who is my teacher is the most wonderful person in the world

INTO JAPANESE

私の先生は世界で最も素晴らしい人です

BACK INTO ENGLISH

My teacher is the most wonderful person in the world

INTO JAPANESE

私の先生は世界で最も素晴らしい人です

BACK INTO ENGLISH

My teacher is the most wonderful person in the world