Which country remained neutral in both world wars?

A country that remained neutral in both wars:

Europe: Sweden, Switzerland, Spain, Liechtenstein

Asia: Iran (There were too many countries that did not have independence during World War I, so strictly speaking, only Iran did not participate in two wars, including World War II. Although it provided railways for the allies to help the Soviet Union, it was forced to do so to some extent. Saudi Arabia, Thailand and so on. Has participated in World War I)

America: Uruguay, Paraguay, Argentina, Peru, Chile, Colombia (including Ecuador and Venezuela, originally a country, and Panama is also a country, which fought in World War II).

Africa: Similarly, most African countries were independent after World War II, so few countries existed during World War I, including Liberia, a participating country in World War I, so few countries did not participate in the two wars.

Attachment: The victorious countries that participated in the Paris Peace Conference after World War I: the United States, Britain, France, Italy, Japan, Belgium, Brazil, Canada, Australia, South Africa, India, Greece, Guatemala, Haiti, Han Zhi (now part of Saudi Arabia), Honduras, China, Cuba, Liberia, Nicaragua, Panama, Poland, Portugal, Romania and Yugoslavia.