No country in the Americas was occupied by the Nazis.
I think you are confused. The Nazis were German. They were from Germany.
Yes, they did occupy Versailles.
Balkan peninsula
Because they wanted to take them over for Germany
See: Germany in WW2
Bulgaria fought with the Nazis invading Greece in 1940 and the Soviet Union in 1941 with the Germans.
Hitler never took over Bulgaria. Bulgarian government at that time entered to some tie with Hitler's Germany
Bulgaria was self ruled with Monarchy and Parliament. When The Nazis came into power and Bulgaria became part of the Axis powers they were not completely dedicated to the Nazi causes or invasions of other countries. The story is long and complex so I am giving you a link below where you can read about Bulgaria in World War 2.
They didn't, although they did occupy the channel islands from June 30th 1940 until 9th May 1945.
Finland was an ally of Nazi Germany from 1941-45 and was not occupied.
Croatia, Slovakia and Bulgaria were active allies of Nazi Germany. Nazi hostility to the speakers of Slavonic languages was very flexible.