YOU SAID:

that's what all the people say

INTO JAPANESE

それはすべて、人の言うことです。

BACK INTO ENGLISH

It is all the people say.

INTO JAPANESE

すべての人の言うことです。

BACK INTO ENGLISH

Is to say all of them.

INTO JAPANESE

それらのすべてを言うことです。

BACK INTO ENGLISH

Is to say all of them.