There have been various classification schemes for Southeast Asian languages (see the articles for the respective language families). Language families include: * Tai–Kadai * Austronesian * Austroasiatic * Hmong–Mien * Sino-Tibetan A number of language groups in Arunachal Pradesh traditionally considered to be Sino-Tibetan (Tibeto-Burman) may in fact constitute independent language families or isolates (Roger Blench 2011). (See Language isolates and independent language families in Arunachal)