Indonesian archipelago in the context of "Islam Nusantara"

Indonesian (Bahasa Indonesia) is the official and national language of Indonesia. It is a standardized variety of Malay, an Austronesian language that has been used as a lingua franca in the multilingual Indonesian archipelago for centuries. With over 280 million inhabitants, Indonesia ranks as the fourth-most populous nation globally. According to the 2020 census, over 97% of Indonesians are fluent in Indonesian, making it the largest language by number of speakers in Southeast Asia and one of the most widely spoken languages in the world. Indonesian vocabulary has been influenced by various native regional languages such as Javanese, Sundanese, Minangkabau, Balinese, Banjarese, and Buginese, as well as by foreign languages such as Arabic, Dutch, Hokkien, Portuguese, Sanskrit, and English. Many borrowed words have been adapted to fit the phonetic and grammatical rules of Indonesian, enriching the language and reflecting Indonesia's diverse linguistic heritage.

Most Indonesians, aside from speaking the national language, are fluent in at least one of the more than 700 indigenous local languages; examples include Javanese and Sundanese, which are commonly used at home and within the local community. However, most formal education and nearly all national mass media, governance, administration, and judiciary and other forms of communication are conducted in Indonesian.

The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an Australian internal territory in the central and central-northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the Northern Territory looks out to the Timor Sea, the Arafura Sea, and the Gulf of Carpentaria, including Western New Guinea and various other islands of the Indonesian archipelago.

The NT covers 1,347,791 square kilometres (520,385 sq mi), making it the third-largest Australian federal division, and the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 260,400 as of March 2025 – fewer than half the population of Tasmania. The largest population centre is the capital city of Darwin, having about 52.6% of the Territory's population. The largest inland settlement is Alice Springs with a population of about 25,000 people.

The Lesser Sunda Islands (Indonesian: Kepulauan Sunda Kecil, Tetum: Illá Sunda ki'ik sirá, Balinese: ᬓᬧᬸᬮᭀᬯᬦ᭄ᬲᬸᬦ᭄ᬤᬘᬾᬦᬶᬓ᭄, romanized: Kapuloan Sunda cénik), now known as Nusa Tenggara Islands (Indonesian: Kepulauan Nusa Tenggara, or "Southeast Islands"), are an archipelago in the Indonesian archipelago. Most of the Lesser Sunda Islands are located within the Wallacea region, except for the Bali province which is west of the Wallace Line and is within the Sunda Shelf. Together with the Greater Sunda Islands to the west, they make up the Sunda Islands. The islands are part of a volcanic arc, the Sunda Arc, formed by subduction along the Sunda Trench in the Java Sea. In 1930 the population was 3,460,059; today over 17 million people live on the islands. Etymologically, Nusa Tenggara means "Southeast Islands" from the words of nusa which means 'island' from Old Javanese language and tenggara means 'southeast'.

The main Lesser Sunda Islands are, from west to east: Bali, Lombok, Sumbawa, Flores, Sumba, Savu, Rote, Timor, Atauro, Alor archipelago, Barat Daya Islands, and Tanimbar Islands. Apart from the eastern half of Timor island and Atauro island which constitute the nation of Timor Leste, all the other islands are part of Indonesia.

Indonesian names and naming customs reflect the multicultural and multilingual nature of the over 17,000 islands in the Indonesian archipelago. The world's fourth most populous country, Indonesia is home to numerous ethnic groups, each with their own culture, custom, and language.

The naming customs by no means are consistent, and may differ by ethnic group. For example, most western Indonesians do not have surnames (exceptions: Bataks, Nias, Mentawai, Enggano, and some Dayaks), while eastern Indonesians generally do (exceptions: Balinese, West Nusa Tenggara people, and some ethnic groups in Sulawesi).

Malay Indonesians (Malay/Indonesian: Orang Melayu Indonesia; Jawi: اورڠ ملايو ايندونيسيا‎) are ethnic Malays living throughout Indonesia. They are one of the indigenous peoples of the country. Indonesian, the national language of Indonesia, is a standardized form of Riau Malay. There were numerous kingdoms associated with the Indonesian Malays along with other ethnicities in what is now Indonesia, mainly on the islands of Borneo and Sumatra. These included Srivijaya, the Melayu Kingdom, Dharmasraya, the Sultanate of Deli, the Sultanate of Siak Sri Indrapura, the Riau-Lingga Sultanate, the Sultanate of Bulungan, Pontianak Sultanate, and the Sultanate of Sambas. The 2010 census states that there are 8 million Malays in Indonesia; this number comes from the classification of Malays in East Sumatra and the coast of Kalimantan which is recognized by the Indonesian government. This classification is different from the Malaysia and Singapore census which classify Malays as a broader racial category, which aside from the core ethnic Malays also includes all Muslim ethnic groups from the Indonesian archipelago (inc. Acehnese, Banjarese, Bugis, Mandailing, Minangkabau and Javanese) as Malays.

South Sulawesi (Indonesian: Sulawesi Selatan; Lontara: ᨔᨘᨒᨓᨙᨔᨗ ᨔᨛᨒᨈ) is a province in the southern peninsula of Sulawesi, Indonesia. The Selayar Islands archipelago to the south of Sulawesi is also part of the province. The capital and largest city is Makassar. The province is bordered by Central Sulawesi and West Sulawesi to the north, the Gulf of Bone and Southeast Sulawesi to the east, Makassar Strait to the west, and Flores Sea to the south.

The 2010 census estimated the population as 8,032,551, which makes South Sulawesi the most populous province on the island (46% of the population of Sulawesi is in South Sulawesi), and the sixth most populous province in Indonesia. At the 2020 Census, this had risen to 9,073,509, and the official estimate as of mid-2024 was 9,463,390 (comprising 4,701,970 males and 4,761,410 females). The main ethnic groups in South Sulawesi are the Buginese, Makassarese and Torajan. The economy of the province is based on agriculture, fishing, and the mining of gold, magnesium, iron, and other metals. The pinisi, a traditional Indonesian two-masted sailing ship, is still used widely by the Buginese and Makassarese, mostly for inter-insular transportation, cargo, and fishing purposes within the Indonesian archipelago.