YOU SAID:

i burned an orphanage and slaughtered everyone inside

INTO JAPANESE

私は孤児院を焼き、中の人を皆殺しにした

BACK INTO ENGLISH

I burned down the orphanage and killed everyone in it.

INTO JAPANESE

孤児院を焼き払って皆殺しにした

BACK INTO ENGLISH

We burned down the orphanage and killed them all.

INTO JAPANESE

孤児院を焼き殺した

BACK INTO ENGLISH

I burned down the orphanage.

INTO JAPANESE

私は孤児院を焼いた。

BACK INTO ENGLISH

I burned down the orphanage.