YOU SAID:

You never know someone until you've forgotten

INTO JAPANESE

忘れるまで誰かを知らない

BACK INTO ENGLISH

I don't know anyone until I forget

INTO JAPANESE

忘れるまで誰も知らない

BACK INTO ENGLISH

No one knows until you forget

INTO JAPANESE

忘れるまで誰も知らない

BACK INTO ENGLISH

No one knows until you forget