YOU SAID:

When the whales come in from the east, put the banners down and they will know they're home.

INTO JAPANESE

クジラが東から入ってきたら、横断幕を下ろすと、彼らは彼らが家にいることを知るでしょう。

BACK INTO ENGLISH

When whales come in from the east, put down the banner and they will know they are at home.

INTO JAPANESE

クジラが東からやってくるときは、バナーを置いてください。そうすれば、彼らは家にいることがわかります。

BACK INTO ENGLISH

Then it will

INTO JAPANESE

そうすれば

BACK INTO ENGLISH

Then it will