YOU SAID:

You know, let's wait till the cows come home!

INTO JAPANESE

牛が帰ってくるまで待ちましょう！

BACK INTO ENGLISH

Let's wait until the cow is back!

INTO JAPANESE

牛が戻ってくるまで待ちましょう！

BACK INTO ENGLISH

Wait for the cow to come back!

INTO JAPANESE

牛が戻ってくるのを待ちます！

BACK INTO ENGLISH

Wait for the cow to come back!