Hi Alexis,

Well, I would never use cupboard for storing clothing. Here in Québec, cupboard is used for storage space in the kitchen.

Wardrobes are those stand-up moveable furniture thingies in which you hang your clothing (robes = dresses in French).

Closets are all the other storage areas around the house that are not in the kitchen and are shut off with a door. In bedrooms you sometimes have walk-in closets - places to store your clothes that are the size of a small room. Not in my bedroom mind you, which is probably the size of the average walk-in

I'm not sure of the second part of your question though. HOWEVER, isn't wardrobe still used as the name of a room in the theatre - where people go to change costumes?