YOU SAID:

Your most unhappy customers are your greatest source of learning.

INTO JAPANESE

最も不幸なお客様は、学習の最大の源です。

BACK INTO ENGLISH

Most unhappy customers is the greatest source of learning.

INTO JAPANESE

最も不幸な顧客は、学習の最大の源です。

BACK INTO ENGLISH

Most unhappy customers is the greatest source of learning.