YOU SAID:

one must not judge a book by its cover

INTO JAPANESE

本を表紙で判断してはいけません

BACK INTO ENGLISH

Don't judge the book by the cover

INTO JAPANESE

表紙で本を判断しないでください

BACK INTO ENGLISH

Do not judge the book by the cover

INTO JAPANESE

表紙で本を判断しないでください

BACK INTO ENGLISH

Do not judge the book by the cover