sumarian i would think...not certain though.
I belive the languge spoken in Mesoptamia was Sumer. :D
The main language spoken in Amsterdam is Dutch.
The main language spoken in Bali is Balinese.
The main language spoken in Portugal is Portuguese.
The main language spoken in Serbia is Serbian.
The main language spoken in the Netherlands is Dutch.
The main language spoken in Athens is Greek.
The main language spoken in Caracas is Spanish.
in the US English in the main spoken language. Colorado is in the US
The main language spoken in Barcelona is Catalan.
The main language spoken in Transylvania is Romanian.
The main language spoken in Patagonia is Spanish.