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Indonesian languages, broadly, the Austronesian languages of island Southeast Asia as a whole, including the languages of Indonesia, Malaysia, Brunei, the Philippines, and Taiwan, and the outlying areas of Madagascar and of Palau and the Mariana Islands of western Micronesia. A more restricted core area includes only the languages of Indonesia, Malaysia, and Brunei. The term has been used in the broader sense by Japanese and Chinese linguists concerned with the aboriginal languages of Taiwan,...