Something new to me...

When you are in a foreign country, it is important to know how to refer to different ethnic groups in a polite way. For example in the United State, it is fine to refer Americans as white people or African Americans as black people. But it is often offensive to call black people as Negroes in the U.S. However, few days ago I learnt something new from a Brazilian. He said in Brazil "Negro" is a respecful word in contrast to "Black". Also, Asian group in Brazil is identified as "Yellow people", which many Asian (especially Koreans) in the United State feel being insulted. In general, be aware of using impolite terms to denote ethnic groups in foreign countries.