YOU SAID:
Hahahaha what are we doing here
INTO JAPANESE
はははは、ここで何をしているの?
BACK INTO ENGLISH
haha what are you doing here
INTO JAPANESE
ここで何してるの?
BACK INTO ENGLISH
what are you doing here
INTO JAPANESE
あなたはここで何をしているの
BACK INTO ENGLISH
what are you doing here
That didn't even make that much sense in English.