YOU SAID:

you never truly understand something until you can explain it to your mother

INTO JAPANESE

母親に説明できるまで、何かを本当に理解することはありません

BACK INTO ENGLISH

You don't really understand anything until you can explain it to your mother

INTO JAPANESE

母親に説明するまで何も分からない

BACK INTO ENGLISH

I don't know anything until I explain it to my mother

INTO JAPANESE

母に説明するまで何も知らない

BACK INTO ENGLISH

I don't know anything until I explain it to my mother