YOU SAID:

The illegals need to go back.

INTO JAPANESE

違法行為者は元に戻る必要があります。

BACK INTO ENGLISH

Illegal actors need to return.

INTO JAPANESE

違法行為者は復帰する必要があります。

BACK INTO ENGLISH

Illegals must return.

INTO JAPANESE

違法行為者は戻らなければなりません。

BACK INTO ENGLISH

Illegals must return.