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ISO 639 3字母代碼表：a b c d e f g h i j k l m n o p q r s t u v w x y z

下表為 ISO 639-2, ISO 639-3, ISO 639-5 的一份或多份標準中，所採用的3字母（又稱alpha-3）語言代碼。

備註

SIL: “Ethnologue”第14版代碼；已被 ISO 639-3 (“Ethnologue”第15版）取代
(b): 只用在 ISO 639-2/B，不收錄在 ISO 639-3
(c): ISO 639-2 集合語言，未必屬同一語族，不收錄在 ISO 639-3 和 ISO 639-5
(d): deprecated, 已棄用代碼
(f): ISO 639-5 語系和語群代碼
(g): group of languages, ISO 639-2 諸語言，同時收錄在 ISO 639-5；不收錄在 ISO 639-3。
(m): 該語言同時被劃分為多種小語言
(r): others 或 rest of languages, ISO 639-2 「其他」類語言，在使用 ISO 639-2 時，供沒有 ISO 639-2 的語言使用，同時收錄在 ISO 639-5；不收錄在 ISO 639-3。
(rc): 曾出現在 ISO 639-3 ，但現被改為其他代碼
(rd): remove duplicates, 與其他代碼重複而被棄用
(rm): remove merged, 已與其他代碼合併
(rn): remove nonexistent, 此代碼所代表的語言不存在，已被取消
(rs): remove split, 此語言被拆分為多種語言，另行編碼

表中使用的縮寫如下：

Scope：I = 獨立語種；M = 宏語言, S = 特殊編碼
Type：A = 古代語言（ancient，通常指該語言已於古代滅絕）、C = 人工語言（Constructed language）、E = 已滅絕（extinct，指近代才滅絕的語言）, H = 歷史語言（英语：Historical language）（該語言已演化為其他現代語言）、L = 現代語言（英语：Modern language）（Living）、S = 特殊編碼

已不再使用的代碼被標記於(括號)中。

「分類」一欄包含該語言的語言分類或宏語言之通用英文名稱。

639-3	639-1	639-2B	Scope/Type	分類	原名	英語	法語	西語	漢語	俄語	德語
laa			I/L			Subanun, Lapuyan
lab			I/A			Linear A			线形文字A
lac			I/L			Lacandon	lacandon
lad		lad	I/L		ג'ודיאו–איספאנייול	Ladino	judéo-espagnol	judeo-español	拉迪诺语; 犹太-西班牙语	ладино	Judezmo
lae			I/L			Pattani
laf			I/L			Lafofa
lag			I/L			Langi
lah		lah	M/L		ਲਹਿੰਦੀ	Lahnda	lahnda	lahnda	拉亨达语	лахнда
lai			I/L			Lambya
laj			I/L			Lango (Uganda)			兰戈语
lak			I/L			Laka (Nigeria)
lal			I/L			Lalia
lam		lam	I/L			Lamba	lamba		兰巴语	ламба
lan			I/L			Laru
lao	lo	lao	I/L	Tai–Kadai	ພາສາລາວ	Lao	lao	laosiano	老挝语; 寮国语	лаосский	Laotisch
lap			I/L			Laka (Chad)
laq			I/L			Qabiao			普标语
lar			I/L			Larteh
las			I/L			Lama (Togo)
lat	la	lat	I/A	Indo-European	lingua Latīna	Latin	latin	latín	拉丁语	латинский	Latein(isch)
lau			I/L			Laba
lav	lv	lav	M/L	Indo-European	latviešu	Latvian	letton	letón	拉脱维亚语	латышский	Lettisch
law			I/L			Lauje
lax			I/L			Tiwa		tiwa	提瓦语
lay			I/L			Lama (Myanmar)
laz			I/E			Aribwatsa
(lba)			I/E			Lui
lbb			I/L			Label
lbc			I/L			Lakkia	lakkia		拉珈语
lbe			I/L		лакку	Lak	lak	laco	拉克语	лакский
lbf			I/L			Tinani
lbg			I/L			Laopang
lbi			I/L			La'bi
lbj			I/L			Ladakhi	ladakhi	ladakhi	拉达克语
lbk			I/L			Central Bontok
lbl			I/L			Libon Bikol
lbm			I/L			Lodhi
lbn			I/L			Lamet
lbo			I/L			Laven
lbq			I/L			Wampar					Wampar
lbr			I/L			Lorung, Northern
lbs			I/L			Libyan Sign Language			利比亚手语	ливийский жестовый
lbt			I/L			Lachi			拉基语
lbu			I/L			Labu
lbv			I/L			Lavatbura-Lamusong					Lavatbura-Lamusong
lbw			I/L			Tolaki
lbx			I/L			Lawangan
lby			I/E			Lamu-Lamu
lbz			I/L			Lardil
lcc			I/L			Legenyem
lcd			I/L			Lola
lce			I/L			Loncong
lcf			I/L			Lubu
lch			I/L			Luchazi
lcl			I/L			Lisela
lcm			I/L			Tungag
lcp			I/L			Lawa, Western
lcq			I/L			Luhu
lcs			I/L			Lisabata-Nuniali
lda			I/L			Kla-Dan
ldb			I/L			Idun
ldd			I/L			Luri
ldg			I/L			Lenyima
ldh			I/L			Lamja-Dengsa-Tola
ldi			I/L			Laari
ldj			I/L			Lemoro
ldk			I/L			Leelau
ldl			I/L			Kaan
ldm			I/L			Landoma
ldn			I/C			Láadan
ldo			I/L			Loo
ldp			I/L			Tso
ldq			I/L			Lufu
lea			I/L			Lega-Shabunda
leb			I/L			Lala-Bisa
lec			I/L			Leco
led			I/L			Lendu
lee			I/L			Lyélé
lef			I/L			Lelemi
(leg)			I/L			Lengua
leh			I/L			Lenje				лендже
lei			I/L			Lemio
lej			I/L			Lengola				ленгола
lek			I/L			Leipon					Leipon
lel			I/L			Lele (Democratic Republic of Congo)
lem			I/L			Nomaande
len			I/E			Lenca
leo			I/L			Leti (Cameroon)
lep			I/L			Lepcha		lepcha	雷布查语
leq			I/L			Lembena
ler			I/L			Lenkau
les			I/L			Lese
let			I/L			Lesing-Gelimi
leu			I/L			Kara (Papua New Guinea)
lev			I/L			Lamma
lew			I/L			Kaili, Ledo
lex			I/L			Luang
ley			I/L			Lemolang
lez		lez	I/L		лезги	Lezghian	lezghien	lezguio	列兹金语; 莱兹金语	лезгинский	Lesgisch
lfa			I/L			Lefa
lfn			I/C			Lingua Franca Nova			新共同语言
lga			I/L			Lungga
lgb			I/L			Laghu
lgg			I/L			Lugbara			卢格巴拉语
lgh			I/L			Laghuu
lgi			I/L			Lengilu
lgk			I/L			Lingarak
lgl			I/L			Wala
lgm			I/L			Lega-Mwenga
lgn			I/L			Opuuo
lgq			I/L			Logba			洛格巴语
lgr			I/L			Lengo
lgt			I/L			Pahi
lgu			I/L			Longgu
lgz			I/L			Ligenza
lha			I/L			Laha (Viet Nam)			拉哈语
lhh			I/L			Laha (Indonesia)
lhi			I/L			Lahu Shi			拉祜西语
lhl			I/L			Lohar, Lahul
lhm			I/L			Lhomi			洛米藏语
lhn			I/L			Lahanan					Lahananisch
lhp			I/L			Lhokpu
lhs			I/E			Mlahsö
lht			I/L			Toga
lhu			I/L		Laˇhuˍ hkawˇ	Lahu			拉祜语; 拉祜纳语
lia			I/L			Limba, West-Central
lib			I/L			Likum
lic			I/L			Hlai			黎语
lid			I/L			Nyindrou
lie			I/L			Likila
lif			I/L		ᤛᤡᤖᤡᤈᤨᤅ	Limbu	limbou	limbu
lig			I/L			Ligbi
lih			I/L			Lihir
(lii)			I/L			Lingkhim
lij			I/L		líguru	Ligurian	ligure	ligur	利古里亚语	лигурский	Ligurisch
lik			I/L			Lika
lil			I/L		Sƛ’aƛ’imxǝc	Lillooet
lim	li	lim	I/L	Indo-European	Lèmburgs	Limburgish, Limburgan	limbourgeois		林堡语	лимбургский	Limburgisch
lin	ln	lin	I/L	Niger–Congo	Lingala	Lingala	lingala	lingala	林加拉语; 林格拉语	лингала	Lingala
lio			I/L			Liki
lip			I/L			Sekpele
liq			I/L			Libido
lir			I/L			Liberian English				либерийский креольский английский
lis			I/L			Lisu	lisu		傈僳语
lit	lt	lit	I/L	Indo-European	lietuvių	Lithuanian	lituanien	lituano	立陶宛语	литовский	Litauisch
liu			I/L			Logorik
liv			I/L			Liv(onian)	livonien	livonio		ливский	Livländisch
liw			I/L			Lembak
lix			I/L			Liabuku
liy			I/L			Banda-Bambari
liz			I/L			Libinza
lja			I/E			Golpa
lje			I/L			Rampi
lji			I/L			Laiyolo
ljl			I/L			Li'o					Li'o
ljp			I/L			Lampung			楠榜语		Lampung
ljw			I/L			Yirandali
ljx			I/E			Yuru
lka			I/L			Lakalei
lkb			I/L			Kabras
lkc			I/L			Kucong			苦聪语
lkd			I/L			Lakondê
lke			I/L			Kenyi
lkh			I/L			Lakha
lki			I/L		له کی له کستان	Laki
lkj			I/L			Remun
lkl			I/L			Laeko-Libuat
lkm			I/E			Kalaamaya
lkn			I/L			Lakona
lko			I/L			Khayo
lkr			I/L			Päri
lks			I/L			Kisa
lkt			I/L		Lakȟótiyapi	Lakota	lakota	lakota
lku			I/E			Kungkari
lky			I/L			Lokoya
lla			I/L			Lala-Roba
llb			I/L			Lolo	lolo		洛勒语
llc			I/L			Lele (Guinea)
lld			I/L		ladin	Ladin	ladin	ladino	拉迪恩语	ладинский	Ladinisch
lle			I/L			Lele (Papua New Guinea)
llf			I/E			Hermit
llg			I/L			Lole
llh			I/L			Lamu
lli			I/L			Teke-Laali
llj			I/E			Ladji Ladji
llk			I/E			Lelak
lll			I/L			Lilau
llm			I/L			Lasalimu
lln			I/L			Lele (Chad)
(llo)			I/L			Khlor
llp			I/L			Efate, North					Nord-Efate
llq			I/L			Lolak
lls			I/L			Lithuanian Sign Language			立陶宛手语	литовский жестовый
llu			I/L			Lau					Lau
llx			I/L			Lauan
lma			I/L			Limba, East
lmb			I/L			Merei
lmc			I/E			Limilngan
lmd			I/L			Lumun
lme			I/L			Pévé
lmf			I/L			Lembata, South
lmg			I/L			Lamogai					Lamogai
lmh			I/L			Lambichhong
lmi			I/L			Lombi
lmj			I/L			Lembata, West
lmk			I/L			Lamkang
lml			I/L			Hano					Hano
(lmm)			I/L			Lamam
lmn			I/L			Lambadi
lmo			I/L		lumbard	Lombard	lombard	lombardo	伦巴底语	ломбардский	Lombardisch
lmp			I/L			Limbum
lmq			I/L			Lamatuka
lmr			I/L			Lamalera
(lms)						Limousin
(lmt)						Lematang
lmu			I/L			Lamenu
lmv			I/L			Lomaiviti
lmw			I/L			Miwok, Lake
lmx			I/L			Laimbue
lmy			I/L			Lamboya					Lamboya
lmz			I/E			Lumbee
lna			I/L			Langbashe
lnb			I/L			Mbalanhu
(lnc)						Languedocien
lnd			I/L			Lundayeh
lng			I/A			Langobardic			伦巴底日耳曼语	лангобардский
lnh			I/L			Lanoh
lni			I/L			Lantanai
lnj			I/E			Leningitij
lnl			I/L			Banda, South Central
lnm			I/L			Langam
lnn			I/L			Lorediakarkar
lno			I/L			Lango (Sudan)
lns			I/L			Lamnso'
(lnt)						Lintang
lnu			I/L			Longuda
lnw			I/E			Lanima
lnz			I/L			Lonzo
loa			I/L			Loloda
lob			I/L			Lobi
loc			I/L			Inonhan
(lod)						Berawan
loe			I/L			Saluan, Coastal
lof			I/L			Logol
log			I/L			Logo
loh			I/L			Narim
loi			I/L			Loma (Côte d'Ivoire)
loj			I/L			Lou					Lou
lok			I/L			Loko
lol		lol	I/L			Mongo	mongo		芒戈语; 蒙戈语	монго
lom			I/L		Lö(g)ömàgòòi	Loma (Liberia)
lon			I/L			Lomwe, Malawi
loo			I/L			Lombo
lop			I/L			Lopa
loq			I/L			Lobala
lor			I/L			Téén
los			I/L			Loniu
lot			I/L			Otuho
lou			I/L			Louisiana Creole French			路易斯安那克里奥尔法语	луизианский креольский французский
lov			I/L			Lopi
low			I/L			Lobu, Tampias
lox			I/L			Loun
loy			I/L			Lowa
loz		loz	I/L		siLozi	Lozi	lozi	lozi	洛齐语	лози	Lozi
lpa			I/L			Lelepa
lpe			I/L			Lepki
lpn			I/L			Long Phuri Naga
lpo			I/L			Lipo			傈颇语
lpx			I/L			Lopit
lra			I/L			Lara'
lrc			I/L			Luri, Northern			北卢尔语	северный лурский
lre			I/E			Laurentian	laurentiennes	laurentiano
lrg			I/E			Laragia
lri			I/L			Marachi
lrk			I/L			Loarki
lrl			I/L			Lari
lrm			I/L			Marama
lrn			I/L			Lorang
lro			I/L			Laro
lrr			I/L			Lorung, Southern
lrt			I/L			Larantuka Malay
lrv			I/L			Larevat
lrz			I/L			Lemerig
lsa			I/L			Lasgerdi
lsd			I/L			Lishana Deni
lse			I/L			Lusengo
(lsg)			I/L			Lyons Sign Language			里昂手语	лионский жестовый
lsh			I/L			Lish
lsi			I/L			Lashi			勒期语
lsl			I/L			Latvian Sign Language			拉脱维亚手语	латвийский жестовый
lsm			I/L			Saamia
lsn			I/L			Tibetan Sign Language
lso			I/L			Laos Sign Language			老挝手语	лаосский жестовый
lsp			I/L			Panamanian Sign Language			巴拿马手语	панамский жестовый
lsr			I/L			Aruop
lss			I/L			Lasi
lst			I/L			Trinidad and Tobago Sign Language			特立尼达和多巴哥手语
lsv			I/L			Sivia Sign Language
lsy			I/L			Mauritian Sign Language				маврикийский жестовый
ltc			I/H	Chinese		Late Middle Chinese			中古漢語	позднесредневековый китайский
ltg			I/L			Latgalian
lth			I/L	Nilo-Saharan		Thur
lti			I/L			Leti (Indonesia)
ltn			I/L			Latundê
lto			I/L			Tsotso
lts			I/L			Tachoni
ltu			I/L			Latu
ltz	lb	ltz	I/L	Indo-European	Lëtzebuergesch	Luxembourgish; Letzeburgesch	luxembourgeois	luxemburgués	卢森堡语	люксембургский	Luxemburgisch
lua		lua	I/L	Niger–Congo	lwaà:	Luba-Lulua	luba-lulua		卢巴-卢拉语; 奇卢伯语
lub	lu	lub	I/L	Niger–Congo		Luba-Katanga	luba-katanga		卢巴-加丹加语; 卢巴卡丹加语	луба-катанга
luc			I/L			Aringa
lud			I/L		lüüdi	Ludian	ludien			людиковский
lue			I/L			Luvale			卢瓦勒语
luf			I/L			Laua
lug	lg	lug	I/L	Niger–Congo	Luganda	Luganda	ganda	luganda	干达语; 卢干达语	ганда	Luganda
lui		lui	I/E			Luiseno	luiseno	luiseño	卢伊塞诺语	луисеньо
luj			I/L			Luna
luk			I/L			Lunanakha
lul			I/L			Olu'bo
lum			I/L			Luimbi
lun		lun	I/L		chiLunda	Lunda	lunda		隆达语	лунда
luo		luo	I/L		Dholuo	Luo (Kenya and Tanzania)	luo		卢奥语	луо
lup			I/L			Lumbu
luq			I/L		Lucumí	Lucumi
lur			I/L			Laura
lus		lus	I/L			Lushai	lushai	lusai	卢萨语
lut			I/L		Dəxʷləšucid	Lushootseed
luu			I/L			Lumba-Yakkha
luv			I/L			Luwati
luw			I/L			Luo
luy			M/L			Luyia			卢希亚语
luz			I/L			Luri, Southern			南卢尔语
lva			I/L			Maku'a
lvi			I/L	Austronesian		Lavi
lvk			I/L			Lavukaleve
lvs			I/L			Standard Latvian				стандартный латышский
lvu			I/L			Levuka
lwa			I/L			Lwalu
lwe			I/L			Lewo Eleng
lwg			I/L			Wanga
lwh			I/L			Lachi, White			白拉基语
lwl			I/L			Lawa, Eastern
lwm			I/L			Laomian
lwo			I/L			Luwo
lws			I/L			Malawian Sign Language
lwt			I/L			Lewotobi
lwu			I/L			Lawu
lww			I/L			Lewo
lya			I/L			Layakha
lyg			I/L			Lyngngam
lyn			I/L			Luyana				луяна
lzh			I/H	Chinese		Literary Chinese			文言文
lzl			I/L			Litzlitz
lzn			I/L			Leinong Naga
lzz			I/L		ლაზური	Laz	laz(e)	lazo	拉兹语	лазский