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Proto-Oceanic is the theoretical mother tongue of the Oceanic peoples and the language from which all the Oceanic languages are thought to descend. It is a huge family, encompassing more than 450 languages, including those spoken on all the islands of Polynesia, most of the smaller islands of Melanesia, and all the islands of Micronesia except two. It is itself a branch of the larger Austronesian language family, a truly stupendous grouping of more than a thousand languages, which includes, in addition to all the Oceanic languages, those of the Philippines, Borneo, Indonesia, Timor, the Moluccas, and Madagascar. The very oldest Austronesian languages—and thus, in a sense, their geographic root—are a group of languages known as Formosan, a few of which are still spoken by the indigenous inhabitants of Ilha Formosa (Beautiful Island), an old Portuguese name for the island of Taiwan. Thus, at least from a linguistic point of view, the path back from Polynesia to the ultimate homeland proceeds through the Melanesian and Southeast Asian archipelagoes to an island off the coast of China, where the trail goes cold around 5000 or 6000 B.C.
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