Endonym and exonym

An endonym (also known as autonym) is a common, native name for a group of people, individual person, geographical place, language or dialect, meaning that it is used inside a particular group or linguistic community to identify or designate themselves, their homeland, or their language.

An exonym (also known as xenonym) is an established, non-native name for a group of people, individual person, geographical place, language or dialect, meaning that it is used primarily outside the particular place inhabited by the group or linguistic community. Exonyms exist not only for historico-geographical reasons but also in consideration of difficulties when pronouncing foreign words, or from non-systematic attempts at transcribing into a different writing system.

For instance, Deutschland is the endonym for the country that is also known by the exonym Germany in English, Alemania and Allemagne in Spanish and French, respectively, and Niemcy in Polish.