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1 (National)
Lao
[lao]
1 (National). Statutory national language (2003, Constitution, Article 89). 4,230,000 in Laos, all users. L1 users: 3,430,000 in Laos (2015 census), based on ethnicity. L2 users: 800,000. Total users in all countries: 4,505,160 (as L1: 3,705,160; as L2: 800,000).
5 (Dispersed)
Akha
[ahk]
5* (Dispersed). 113,000 in Laos (2015 census), based on ethnicity.
French
[fra]
5* (Dispersed). 190,000 in Laos (Beck et al 2018), L2 users.
5 (Developing)
Brao
[brb]
5* (Developing). 26,000 in Laos (2015 census), based on ethnicity. Total users in all countries: 35,560.
Bru, Eastern
[bru]
5* (Developing). 37,400 in Laos (2015 census), based on ethnicity. Total users in all countries: 132,000.
Hmong Daw
[mww]
5* (Developing). 170,000 in Laos (1995 census).
Iu Mien
[ium]
5* (Developing). 32,400 in Laos (2015 census), based on ethnicity.
Jeh
[jeh]
5* (Developing). 11,500 in Laos (2015 census), based on ethnicity.
Mal
[mlf]
5* (Developing). 23,200 in Laos (1995 census). Total users in all countries: 26,700.
Nung
[nut]
5* (Developing). A few in Laos.
Tai Dam
[blt]
5* (Developing). 65,000 in Laos (Schliesinger 2003a).
Khmu
[kjg]
5 (Developing). 708,000 in Laos (2015 census), based on ethnicity. Total users in all countries: 825,700.
6a (Vigorous)
Akeu
[aeu]
6a (Vigorous). 1,000 in Laos (1996 E. Johnson).
Alak
[alk]
6a* (Vigorous). 25,000 (2015 census), based on ethnicity.
Bit
[bgk]
6a (Vigorous). 2,370 in Laos (2015 census), based on ethnicity. Total users in all countries: 2,570.
Bru, Western
[brv]
6a* (Vigorous). 163,000 in Laos (2015 census), includes So [sss]. Total users in all countries: 183,000.
Hmong Njua
[hnj]
6a* (Vigorous). 100,000 in Laos (Hattaway 2003). Total users in all countries: 254,750.
Ir
[irr]
6a* (Vigorous). 4,420 (Asian Minorities Outreach 1999b), based on ethnicity.
Kaduo
[ktp]
6a* (Vigorous). 200 in Laos (Schliesinger 2003c).
Kang
[kyp]
6a* (Vigorous). 47,600 in Laos (1995 census). Total users in all countries: 81,700.
Katang, Northern
[ncq]
6a (Vigorous). 65,000 (2016).
Katang, Southern
[sct]
6a (Vigorous). 40,000 (2016).
Katu, Western
[kuf]
6a (Vigorous). 28,400 (2015 census), based on ethnicity.
Khuen
[khf]
6a* (Vigorous). 8,000 in Laos (1995 L. Chazee). Total users in all countries: 9,000.
Khün
[kkh]
6a* (Vigorous). 600 in Laos (Schliesinger 2003a).
Kim Mun
[mji]
6a* (Vigorous). 4,500 in Laos (1995 L. Chazee).
Kriang
[ngt]
6a* (Vigorous). 16,800 (2015 census), based on ethnicity. 9,030 monolinguals (2005).
Ksing Mul
[puo]
6a* (Vigorous). 9,870 in Laos (2015 census), based on ethnicity.
Lahu
[lhu]
6a* (Vigorous). 19,200 in Laos (2015 census), increasing, based on ethnicity.
Lahu Si
[lhi]
6a* (Vigorous). 3,000 in Laos (2007).
Laopang
[lbg]
6a* (Vigorous). 9,550 (2000).
Laos Sign Language
[lso]
6a* (Vigorous). 36,000 (2021 DBS/DOOR/SIL). Estimated 21,000–42,000 deaf signers, based on 0.3%–0.6% of total population.
Laven
[lbo]
6a* (Vigorous). 56,400 (2015 census), based on ethnicity.
Ngoaun
[nuo]
6a* (Vigorous). 760 in Laos (2010 N. Cheeseman).
Nyaheun
[nev]
6a (Vigorous). 9,000 (2015 census), based on ethnicity.
Oy
[oyb]
6a (Vigorous). 32,200 (2015 census), based on ethnicity. 23,500 Oy and 8,690 Jeng (2015 census). 8,960 monolinguals (2007).
Pacoh
[pac]
6a (Vigorous). 22,600 in Laos (2015 census), based on ethnicity. 11,600 monolinguals (2005).
Phong-Kniang
[pnx]
6a* (Vigorous). 30,700 (2015 census), based on ethnicity.
Phu Thai
[pht]
6a* (Vigorous). 218,000 in Laos (2015 census), based on ethnicity.
Phuan
[phu]
6a* (Vigorous). 115,000 in Laos (Schliesinger 2003a), based on ethnicity.
Phunoi
[pho]
6a* (Vigorous). 39,200 (2015 census), based on ethnicity.
Prai
[prt]
6a* (Vigorous). 28,700 in Laos (2015 census), based on ethnicity.
Rmeet
[lbn]
6a* (Vigorous). 22,400 (2015 census), based on ethnicity.
Sapuan
[spu]
6a (Vigorous). 1,000 (Sidwell 2003).
Sedang
[sed]
6a* (Vigorous). 900 in Laos (2015 census), based on ethnicity.
Sila
[slt]
6a (Vigorous). 3,150 in Laos (2015 census), based on ethnicity. Total users in all countries: 4,060.
So
[sss]
6a (Vigorous). 163,000 in Laos (2015 census), based on ethnicity, includes Western Bru [brv]. Total users in all countries: 233,000.
Tai Dón
[twh]
6a* (Vigorous). 33,000 in Laos (Schliesinger 2003a).
Tai Long
[thi]
6a* (Vigorous). 4,800 (2004).
Tai Yo
[tyj]
6a* (Vigorous). 7,200 in Laos (1995 census).
Talieng
[tdf]
6a (Vigorous). 38,400 (2015 census), based on ethnicity.
Ta’oih, Lower
[tto]
6a (Vigorous). 15,800 (2000), increasing.
Ta’oih, Upper
[tth]
6a (Vigorous). 30,900 in Laos (1995 census), increasing. 21,600 monolinguals (1995). Total users in all countries: 49,900.
Tareng
[tgr]
6a* (Vigorous). 5,000 (Wurm and Hattori 1981).
Thai, Northern
[nod]
6a* (Vigorous). 29,500 in Laos (2005 census).
Yang
[pcc]
6a* (Vigorous). 5,840 in Laos (2015 census), based on ethnicity.
6b (Threatened)
Aheu
[thm]
6b* (Threatened). 250 in Laos (Bradley 2007b). Ethnic population: 500 (Bradley 2007b).
Bo
[bgl]
6b (Threatened). 8,000 (Schliesinger 2003b), based on ethnicity.
Con
[cno]
6b* (Threatened). 1,000 (Wurm and Hattori 1981).
Halang Doan
[hld]
6b* (Threatened). 2,350 in Laos (2000).
Hani
[hni]
6b (Threatened). 740 in Laos (2015 census), decreasing, based on ethnicity.
Khua
[xhv]
6b* (Threatened). 2,000 in Laos (1981).
Kiorr
[xko]
6b* (Threatened). 2,360 (1985 F. Proschan).
Kuan
[uan]
6b* (Threatened). 890 (2015 census), based on ethnicity.
Kuay
[kdt]
6b (Threatened). 46,600 in Laos (2015 census), based on ethnicity. 34,200 monolinguals (2005).
Lü
[khb]
6b* (Threatened). 126,000 in Laos (2015 census), based on ethnicity.
Maleng
[pkt]
6b (Threatened). 500 in Laos (Bradley 2007a). Ethnic population: Less than 1,000. Total users in all countries: 1,700.
Phana’
[phq]
6b* (Threatened). 380 (Schliesinger 2003c). Ethnic population: Included within the Ahka [ahk] ethnic group.
Saek
[skb]
6b* (Threatened). 3,840 in Laos (2015 census), based on ethnicity.
Salang
[hal]
6b* (Threatened). 4,000 in Laos (Asian Minorities Outreach 1999b).
Samtao
[stu]
6b* (Threatened). 3,420 in Laos (2015 census), based on ethnicity.
Sou
[sqq]
6b* (Threatened). 2,500 (Schliesinger 2003b).
Tai Daeng
[tyr]
6b* (Threatened). 25,000 in Laos (Asian Minorities Outreach 1999b).
Tai Khang
[tnu]
6b (Threatened). 200. Ethnic population: 1,500 (Schliesinger 2003a).
Tai Nüa
[tdd]
6b* (Threatened). 14,100 in Laos (2015 census), based on ethnicity.
Tai Pao
[tpo]
6b* (Threatened). 2,500 in Laos (Schliesinger 2003a). Total users in all countries: 12,500.
Yoy
[yoy]
6b* (Threatened). 2,000 in Laos (1999 census).
7 (Shifting)
Chepya
[ycp]
7 (Shifting). 1,000 (Bradley 2007b). Ethnic population: 2,000 (Bradley 2007b).
Chut
[scb]
7 (Shifting). 200 in Laos (Bradley 2007a). 50 May, 150 Ruc (Bradley 2007a). Ethnic population: 400 (Bradley 2007b).
Hung
[hnu]
7 (Shifting). 3,630 in Laos (2015 census), based on ethnicity. Total users in all countries: 4,130.
O’du
[tyh]
7 (Shifting). 600 in Laos (2015 census), decreasing, based on ethnicity.
Ong
[oog]
7 (Shifting). 10,300 (2000).
8a (Moribund)
Arem
[aem]
8a (Moribund). 250 in Laos (Enfield and Diffloth 2009). Ethnic population: 500 (1995).
Cham
[cja]
8a (Moribund). Ethnic population: 340 (Schliesinger 2003a).
Lavi
[lvi]
8a (Moribund). Ethnic population: 1,220 (2015 census).
Mlabri
[mra]
8a (Moribund). 40 in Laos (Schliesinger 2003b). Ethnic population: 67 (Schliesinger 2003d).
8b (Nearly extinct)
Tai Loi
[tlq]
8b (Nearly extinct). Ethnic population: 600 (Schliesinger 2003b).
Unestablished
Chinese, Mandarin
[cmn]
Unestablished. 66,000 in Laos (2018 J. Leclerc), based on ethnicity.
Chinese, Yue
[yue]
Unestablished. 18,000 in Laos (2018 J. Leclerc), based on ethnicity.
Khmer
[khm]
Unestablished. 7,000 in Laos (2015 census), based on ethnicity.
Myen
[mya]
Unestablished. 2,840 in Laos (2015 census).
Vietnamese
[vie]
Unestablished. 18,900 in Laos (2015 census), based on ethnicity.