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A language family is a group of languages that are derived from a single language of origin. There are more than 10 major language families. The Indo-European family includes more than 400 languages with a common Indo-European origin that may go back to 2000 BCE. The languages in this family are the most widely spoken in the world, with almost 3 billion speakers from Europe to Asia. The Indo-European family includes languages spoken in India, the Slavic languages (Russian, Polish), Greek, the Germanic languages (German, English, Flemish, Norwegian, etc.), the Celtic languages, and the languages of Latin origin (French, Italian, Spanish, Portuguese, etc.). Smaller families, like the Papuan languages (in Papua New Guinea), include almost 3,400 languages, spoken by less than 4% of the world population. Amerindian languages belong to indigenous languages, as well as Australian (mainly Aborigene), Eskimo-Aleut and Tasmanian languages.