I don't know Duo, but I know what I am doing.
But on a serious note. I really appreciate Latin's brevity.
Is it correct do use quid as 'what' when you didn't hear what somebody said or when you didn't understand what was said?
Could it be "what are we making"?
The pronunciation of 'facimus' sounds a little inappropriate...
Sometimes when "facit" is an option, I'll just poke at it over and over again while giggling like a 10 year old boy, much to the chagrin of my very grown up and mature girlfriend.
Does iter facit mean he/she/it does a journey, then?
Yes. You can also translate "facit" as "make" in that context: "He makes a journey." Whichever you prefer.
Is "What do we do?" wrong?,
if so, why?