In terms of ethnicity, both the united states and switzerland

United States and Switzerland are both  made up of many ethnicities.

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In terms of ethnicity, both the United States and Switzerland are made up of many ethnicities.

These places may be know as melting pot of cultures which refers to a society where a several different types of people blend together as one.

An ethnic group or an ethnicity refers to a category of people who identify with each other based on similarities including common ancestry, language, history, society, culture or nation.