So, the interior wall is also concrete; does that mean there is no framing or drywall on the interior?
It depends. The interior side of the exterior shell walls will be of concrete. You can furr it out if you want and install drywall, but this is a completely unnecessary cost. The interior wall is concrete and it receives a fine plaster coat (plaster is basically a very smooth form of concrete). Almost all homes in Europe have plastered interior walls. No, our interior finish is not as flat as drywall – the best comparison is a lath and plaster wall in an old house.