There have been various classification schemes for Southeast Asian languages (see the articles for the respective language families). Language families include:Tai–KadaiAustronesianAustroasiaticHmong–MienSino-TibetanA 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)