YOU SAID:
we are having lunch, Hoang will check when back to work
INTO JAPANESE
私たちは昼食をとっています。ホアンは仕事に戻ったらチェックします
BACK INTO ENGLISH
we are having lunch Huang will check when he gets back to work
INTO JAPANESE
私たちは昼食をとっています。Huang は仕事に戻ったときに確認します
BACK INTO ENGLISH
we are having lunch Huang will check when he gets back to work
That didn't even make that much sense in English.