Translation of dimwit in German

I counted the bills and saw that ten thousand Lire were still missing. The old man return to the children, grabbed the oldest one for a second time and hit him again. A minute later he came back with the missing.
Dinner was a little strange. I was sitting as a guest at the dinner table but somehow I felt very uncomfortable. I felt that everything was staged for me. I sensed that this family was not used to having guests.
We checked in, took a refreshing hot shower and were really happy about our accommodation. As it was late, we took another ride to some restaurant. When we payed the driver he told us that he had no change.