I'll just say what countries I know right now...

America
Canada
Mexico
Puerto Rico
Cuba
Prussia
Russia
Greece
England
Japan
Italy
France
China
Ukraine
Bulgaria
Brazil
Egypt
Vietnam
Korea
Spain
India
Rome
Australia
Switzerland
Greenland
Hong Kong
Denmark
Madagascar
Poland
Finland
Taiwan
Iceland
Afghanistan
Chili
Columbia
Turkey
Costa Rica
Fiji
Columbia

Wow, that's a lot that I know...