Arabic is a language cluster comprising 30 or so modern varieties. Its various dialects are spoken by around 422 million speakers (native and non-native) in the Arab world, as well as in the Arab diaspora. The number of speakers makes it one of the five most spoken languages in the world.
Arabic is the lingua franca of people who live in countries of the Arab world as well as of Arabs who live in the diaspora, particularly in Latin America (especially Brazil, Argentina, Venezuela, Chile and Colombia) or Western Europe (like France, Spain, Germany or Italy).