YOU SAID:

Goodbye everybody, I've got to go.

INTO JAPANESE

さようなら、みんな、もう行かなきゃ。

BACK INTO ENGLISH

Goodbye, everyone, I have to go now.

INTO JAPANESE

さようなら、皆さん、もう行かなければなりません。

BACK INTO ENGLISH

Goodbye, everyone, I have to go now.