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Nhân khẩu học > Ngôn ngữ

Mỗi ngôn ngữ đều bị ảnh hưởng bởi áp lực văn hóa do thương mại, nhập cư và quá trình thuộc địa hóa trong lịch sử. Có gần 800 ngôn ngữ bản địa trong khu vực này.
Thành phần ngôn ngữ cho mỗi quốc gia như sau (với các ngôn ngữ chính thức được in đậm):
| Quốc gia/Vùng | Ngôn ngữ |
| --- | --- |
 Andaman and Nicobar Islands: Tiếng Bengali, tiếng Hindi, tiếng Anh, Tamil, Telugu, Malayalam, Shompen, A-Pucikwar, Aka-Jeru, Aka-Bea, Aka-Bo, Aka-Cari, Aka-Kede, Aka-Kol, Aka-Kora, Aka-Bale, Jangil, Jarawa, Oko-Juwoi, Önge, Sentinelese, Camorta, Car, Chaura, Katchal, Nancowry, Southern Nicobarese, Teressa
 Brunei: Tiếng Malay, tiếng Anh, Indonesia, Trung Quốc, Tamil and indigenous Bornean dialects (Iban, Murutic language, Lun Bawang,)
 Cambodia: Tiếng Khmer, tiếng Anh, Pháp, Triều Châu, Việt, Cham, Phổ thông, khác
 East Timor: Tetum, Bồ Đào Nha, Mambae, Makasae, Tukudede, Bunak, Galoli, Kemak, Fataluku, Baikeno, khác
 Indonesia: Indonesia, Javanese, Sundanese, Batak, Minangkabau, Buginese, Banjar, Papuan, Dayak, Acehnese, Ambonese Balinese, Betawi, Madurese, Musi, Manado, Sasak, Makassarese, Batak Dairi, Karo, Mandailing, Jambi Malay, Mongondow, Gorontalo, Ngaju, Kenyah, Nias, North Moluccan, Uab Meto, Bima, Manggarai, Toraja-Sa'dan, Komering, Tetum, Rejang, Muna, Sumbawa, Bangka Malay, Osing, Gayo, Bungku-Tolaki languages, Moronene, Bungku, Bahonsuai, Kulisusu, Wawonii, Mori Bawah, Mori Atas, Padoe, Tomadino, Lewotobi, Tae', Mongondow, Lampung, Tolaki, Ma'anyan, Simeulue, Gayo, Buginese, Mandar, Minahasan, Enggano, Ternate, Tidore, Mairasi, East Cenderawasih Language, Lakes Plain Languages, Tor-Kwerba, Nimboran, Skou/Sko, Border languages, Senagi, Pauwasi, Mandarin, Hokkien, Cantonese, Hakka, Teochew, Tamil, Punjabi, Bengali, and Arabic.  Indonesia has over 700 languages in over 17,000 islands across the archipelago, making Indonesia the second most linguistically diverse country on the planet, slightly behind Papua New Guinea. The official language of Indonesia is Indonesian (Bahasa Indonesia), widely used in educational, political, economic, and other formal situations. In daily activities and informal situations, most Indonesians speak in their local language(s). For more details, see: Languages of Indonesia.
 Laos: Lao, Thai, Việt, Hmong, Miao, Mien, Dao, Shan and khác
 Malaysia: Malaysian, English, Mandarin, Indonesian, Tamil, Kedah Malay, Sabah Malay, Brunei Malay, Kelantan Malay, Pahang Malay, Acehnese, Javanese, Minangkabau, Banjar, Buginese, Tagalog, Hakka, Cantonese, Hokkien, Teochew, Fuzhounese, Telugu, Bengali, Punjabi, Hindi, Sinhala, Malayalam, Arabic, Brunei Bisaya, Okolod, Kota Marudu Talantang, Kelabit, Lotud, Terengganu Malay, Semelai, Thai, Iban, Kadazan, Dusun, Kristang, Bajau, Jakun, Mah Meri, Batek, Melanau, Semai, Temuan, Lun Bawang, Temiar, Penan, Tausug, Iranun, Lundayeh/Lun Bawang, and khác see: Languages of Malaysia
 Myanmar (Burma): Burmese, Shan, Kayin(Karen), Rakhine, Kachin, Chin, Mon, Kayah, Trung Quốc and other ethnic languages.
 Philippines: Filipino (Tagalog), English, Bisayan languages (Aklanon, Cebuano, Kinaray-a, Capiznon, Hiligaynon, Waray, Masbateño, Romblomanon, Cuyonon, Surigaonon, Butuanon, Tausug), Ivatan, Ilocano, Ibanag, Pangasinan, Kapampangan, Bicolano, Sama-Bajaw, Maguindanao, Maranao, Chavacano The Philippines has more than a hundred native languages, most without official recognition from the national government. Spanish and Arabic are on a voluntary and optional basis. Malay (Bahasa Malaysia, Bahasa Indonesia), Mandarin, Lan-nang (Hokkien), Cantonese, Hakka, Japanese and Korean are also spoken in the Philippines due to immigration, geographic proximity and historical ties. See: Languages of the Philippines
 Singapore: English, Malay, Mandarin Chinese, Tamil, Hokkien, Teochew, Cantonese, Hakka, Telugu, Malayalam, Punjabi, Hindi, Sinhala, Javanese, Balinese, Singlish creole and khác
 Thailand: Thai, Isan, Northern Khmer, Malay, Karen, Hmong, Teochew, Minnan, Hakka, Yuehai, Burmese, Mien, Tamil, Bengali, Urdu, Arabic, Shan, Lue, Phutai, Mon and khác
 Vietnam: Tiếng Việt, Tiếng Khơ-me, Cantonese, Tiếng H-mông, Tai, Tiếng Chăm and khác