YOU SAID:
I killed a guy oopsies
INTO JAPANESE
おっと、男を殺した
BACK INTO ENGLISH
oops i killed a man
INTO JAPANESE
おっと、私は人を殺した
BACK INTO ENGLISH
oops i killed someone
INTO JAPANESE
おっと、私は誰かを殺しました
BACK INTO ENGLISH
oops i killed someone
You've done this before, haven't you.