# ISO 639:c

This is a list of ISO 639-3 language codes starting with C.
Index | 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
Abbreviations are used in the table as follows:
* Scope (Archived April 21, 2006, at the Wayback Machine. Additional archives: December 15, 2023.): I = individual language, M = macrolanguage, S = special code
* Type (Archived April 21, 2006, at the Wayback Machine. Additional archives: December 14, 2023.): A = ancient (extinct since ancient times), C = constructed, E = extinct (in recent times), H = historical (distinct from its modern form), L = living, S = special code
Retired codes are enclosed in (parentheses).
The column Family contains the generic English name of the language's family or macrolanguage.
| ISO 639 codes | ISO 639 codes | ISO 639 codes | Scope/Type | Family | Language names | Language names | Language names | Language names | Language names | Language names | Language names |
| 639-3 | 639-1 | 639-2B | Scope/Type | Family | Native | eng | fra | spa | zho | rus | deu |
| caa | | | I/L | | čorti' | Chortí | | chortí | 奇奥蒂语 | | |
| cab | | | I/L | | | Garifuna | garifuna | | | | |
| cac | | | I/L | | | Chuj (San Sebastián Coatán) | | | | | |
| cad | | cad | I/L | | Hasí:nay | Caddo | caddo | caddo | 卡多语 | каддо | Caddo |
| cae | | | I/L | | | Lehar | | | | | |
| caf | | | I/L | | ᑕᗸᒡ | Carrier, Southern | | | | | |
| cag | | | I/L | | | Nivaclé | | | | | |
| cah | | | I/L | | | Cahuarano | | cahuarano | | | |
| caj | | | I/E | | | Chané | | | | | |
| cak | | | I/L | | | Cakchiquel, Central | | cakchiquel central | 喀克其奎语 | | |
| cal | | | I/L | | | Carolinian | carolinien | | 加罗林语 | каролинский | Karolinisch |
| cam | | | I/L | | | Cemuhî | | | | | |
| can | | | I/L | | | Chambri | | | | | |
| cao | | | I/L | | | Chácobo | | | | | |
| cap | | | I/L | | | Chipaya | | | | | |
| caq | | | I/L | | | Nicobarese, Car | | | | | |
| car | | car | I/L | | | Carib | carib(e) | | 加勒比语 | кариб | |
| cas | | | I/L | | | Tsimané | | | | | |
| cat | ca | cat | I/L | Indo-European | català | Catalan | catalan | catalán | 加泰隆尼亚语; 加泰罗尼亚语; 加泰隆语; 瓦伦西亚语 | каталанский | Katalanisch |
| cav | | | I/L | | | Cavineña | | | | | |
| caw | | | I/L | | | Callawalla | | | | | |
| cax | | | I/L | | | Chiquitano | chiquitano | chiquitano | | | |
| cay | | | I/L | | Goyogo̱hó:nǫ’ | Cayuga | cayuga | cayuga | | | |
| caz | | | I/E | | | Canichana | | | | | |
| cbb | | | I/L | | | Cabiyarí | | | | | |
| cbc | | | I/L | | | Carapana | | karapaná | | | |
| cbd | | | I/L | | | Carijona | | carijona | | | |
| (cbe) | | | I/E | spurious language | | Chipiajes | | | | | |
| cbg | | | I/L | | | Chimila | | chimila | | | |
| (cbh) | | | I/E | spurious language | | Cagua | | | | | |
| cbi | | | I/L | | | Chachi | | chachi | | | |
| cbj | | | I/L | | | Ede Cabe | | | | | |
| cbk | | | I/L | | | Chavacano | | | | | |
| cbl | | | I/L | | | Chin, Bualkhaw | | | | | |
| (cbm) | | | I/L | | | Cakchiquel, Yepocapa Southwestern | | | | | |
| cbn | | | I/L | | | Nyahkur | | | | | |
| cbo | | | I/L | | | Izora | | | | | |
| cbq | | | I/L | Niger–Congo | | Cuba, Tsucuba | | | | | |
| cbr | | | I/L | | | Cashibo-Cacataibo | | kashibo-kakataibo | | | |
| cbs | | | I/L | | | Cashinahua | | cashinahua | | | |
| cbt | | | I/L | | | Chayahuita | | | | | |
| cbu | | | I/L | | | Candoshi-Shapra | | | | | |
| cbv | | | I/L | | | Cacua | | | | | |
| cbw | | | I/L | | | Kinabalian | | | | | |
| cby | | | I/L | | | Carabayo | | | | | |
| (cca) | | | I/E | spurious language | | Cauca | | | | | |
| ccc | | | I/L | | | Chamicuro | chamicura | | | | |
| ccd | | | I/L | | | Cafundo Creole | | | | | |
| cce | | | I/L | | | Chopi | | | | | |
| ccg | | | I/L | | | Samba Daka | | | | | |
| cch | | | I/L | | | Atsam | | | | | |
| ccj | | | I/L | | | Kasanga | | | | | |
| ccl | | | I/L | | | Cutchi-Swahili | | | | | |
| ccm | | | I/L | | | Malaccan Creole Malay | | | | | |
| cco | | | I/L | | | Chinantec, Comaltepec | | | | | |
| ccp | | | I/L | | | Chakma | | | | | |
| (ccq) | | | I/L | | | Chaungtha | | | | | |
| ccr | | | I/E | | | Cacaopera | | cacaopera | | | |
| (ccx) | | | I/L | | | Northern Zhuang | | | | | |
| (ccy) | | | I/L | | | Southern Zhuang | | | | | |
| cda | | | I/L | | | Choni | | | | | |
| cde | | | I/L | | | Chenchu | | | | | |
| cdf | | | I/L | | | Chiru | | | | | |
| (cdg) | | | I/L | | | Chamari | | | | | |
| cdh | | | I/L | | | Chambeali | | | | | |
| cdi | | | I/L | | | Chodri | | | | | |
| cdj | | | I/L | | | Churahi | | | | | |
| cdm | | | I/L | | | Chepang | | | | | |
| cdn | | | I/L | | | Chaudangsi | | | | | |
| cdo | | | I/L | Chinese | 閩東語 | Min Dong Chinese | | | 閩東話 | | chinesisch (Ming Dong) |
| cdr | | | I/L | | | Cinda-Regi-Tiyal | | | | | |
| cds | | | I/L | | | Chadian Sign Language | | | 乍得手语 | | |
| cdy | | | I/L | | | Chadong | | | | | |
| cdz | | | I/L | | | Koda | | koda | | | |
| cea | | | I/E | | | Chehalis, Lower | | | | | |
| ceb | | ceb | I/L | | S(in)ugboanon | Cebuano | cebuano | cebuano | 宿务语; 宿雾语 | себуано | Cebuano |
| ceg | | | I/L | | | Chamacoco | | | | | |
| cek | | | I/L | | | Eastern Khumi Chin | | | | | |
| cen | | | I/L | | | Cen | | | | | |
| ces | cs | cze | I/L | Indo-European | čeština | Czech | tchèque | checo | 捷克语 | чешский | Tschechisch |
| cet | | | I/L | | | Centúúm | | | | | |
| cey | | | I/L | Sino-Tibetan | | Ekai Chin | | | | | |
| cfa | | | I/L | | | Dijim-Bwilim | | | | | |
| cfd | | | I/L | | | Cara | | | | | |
| cfg | | | I/L | | | Como Karim | | | | | |
| cfm | | | I/L | | | Falam Chin | | | | | |
| cga | | | I/L | | | Changriwa | | | | | |
| cgc | | | I/L | | | Kagayanen | | | | | |
| cgg | | | I/L | | | Chiga | | | 奇加语 | | |
| cgk | | | I/L | | | Chocangacakha | | | | | |
| cha | ch | cha | I/L | Austronesian | Chamoru | Chamorro | chamorro | chamorro | 查莫罗语 | чаморро | Chamorro |
| chb | | chb | I/E | | | Chibcha | chibcha | chibcha | 奇布查语 | чибча | |
| chc | | | I/E | | Iyeye | Catawba | catawba | | | | |
| chd | | | I/L | | | Chontal, Highland Oaxaca | | | 高地琼塔尔语 | | |
| che | ce | che | I/L | Northeast Caucasian | нохчийн | Chechen | tchétchène | checheno | 车臣语 | чеченский | Tschetschenisch |
| chf | | | I/L | | | Chontal, Tabasco | | chontal de Tabasco | | | |
| chg | | chg | I/E | | جغتای | Chagatai | djaghataï | | 查加台语; 查加泰语; 察合台语 | чагатайский | Tschagataisch |
| chh | | | I/E | | | Chinook | | chinook | | | Chinook Wawa |
| chj | | | I/L | | | Chinantec, Ojitlán | | | | | |
| chk | | chk | I/L | | | Chuukese | chuuk | | 丘克语 | чукотский | Chuukesisch |
| chl | | | I/L | | | Cahuilla | | cahuilla | | | |
| chm | | chm | M/L | | марий | Mari (Russia) | mari | mari | 马里语 | марийский | Mari |
| chn | | chn | I/L | | chinuk wawa | Chinook jargon | jargon chinook | jerga chinook | 奇努克混合语 | чинук жаргон | |
| cho | | cho | I/L | | Chahta | Choctaw | choctaw | choctaw | 乔克托语 | чоктав | |
| chp | | chp | I/L | | ᑌᓀᓲᒢᕄᓀ (Dëne Sųłiné) | Chipewyan | chipewyan | | 奇佩维安语 | чипевьян | Chipewyan |
| chq | | | I/L | | | Chinantec, Quiotepec | | | | | |
| chr | | chr | I/L | | ᏣᎳᎩ | Cherokee | cherokee | cheroqui | 切罗基语 | чероки | Cherokee |
| (chs) | | | I/E | | | Chumash | | | | | |
| cht | | | I/E | | | Cholón | | | | | |
| chu | cu | chu | I/A | Indo-European | ѩзыкъ словѣньскъ | Old Church Slavonic | slavon d'église vieux | eslavo eclesial | 古教会斯拉夫语 | церковнославянский | Altkirchenslawisch |
| chv | cv | chv | I/L | Turkic | Чӑваш | Chuvash | tchouvache | chuvasio | 楚瓦什语 | чувашский | Tschuwaschisch |
| chw | | | I/L | | | Chuwabu | | | | | |
| chx | | | I/L | | | Chantyal | | | | | |
| chy | | chy | I/L | | Tsêhést | Cheyenne | cheyenne | cheyén | 夏延语 | чейенн | |
| chz | | | I/L | | | Chinantec, Ozumacín | | | | | |
| cia | | | I/L | | | Cia-Cia | | | | | |
| cib | | | I/L | | | Gbe, Ci | | | | | |
| cic | | | I/L | | Chikasha | Chickasaw | | chickasaw | 奇卡索语 | | |
| cid | | | I/E | | | Chimariko | | chimariko | | | |
| cie | | | I/L | | | Cineni | | | | | |
| cih | | | I/L | | | Chinali | | | | | |
| cik | | | I/L | | | Kinnauri, Chitkuli | | | | | |
| cim | | | I/L | | Zimbrisch | Cimbrian | cimbrien | | 辛布里语 | | Zimbern |
| cin | | | I/L | | | Cinta Larga | | cinta larga | | | |
| cip | | | I/L | | | Chiapanec | | chiapaneco | | | |
| cir | | | I/L | | | Tiri | | | | | |
| (cit) | | | I/L | Indo-European | চাঁটগাঁইয়া | Chittagonian | Chittagonien | | 吉大港语 | | |
| ciw | | | I/L | | ᐊᓂᐦᔑᓈᐯᒧᐧᐃᓐ / ᐅᒋᐧᐯᒧᐧᐃᓐ (Anishinaabemowin / Ojibwemowin) | Chippewa | chippewa | | 奇帕瓦语 | оджибве | |
| ciy | | | I/L | | | Chaima | | chaima | | | |
| cja | | | I/L | | | Cham, Western | | | 西占语 | | |
| cje | | | I/L | | | CHARu | | | | | |
| cjh | | | I/E | | | Chehalis, Upper | | | | | |
| cji | | | I/L | | | Chamalal | tchamalal | chamalal | 查马拉尔语 | | |
| cjk | | | I/L | | | Chokwe | | | 乔克维语 | чокве | |
| cjm | | | I/L | | | Cham, Eastern | | | 东占语 | | |
| cjn | | | I/L | | | Chenapian | | | | | |
| cjo | | | I/L | | | Ashéninka Pajonal | | | | | |
| cjp | | | I/L | | | Cabécar | | cabécar | | | |
| (cjr) | | | I/E | | | Chorotega | | | | | |
| cjs | | | I/L | | Шор | Shor | | shor | 绍尔语 | шорский | |
| cjv | | | I/L | | | Chuave | | | | | |
| cjy | | | I/L | Chinese | 晋语 | Jinyu Chinese | | | 晉語 | | chinesisch (Jinyu) |
| (cka) | | | I/L | | | Chin, Khumi Awa | | | | | |
| ckb | | | I/L | Indo-European | کوردی | Kurdish, Central | | | 中库尔德语 | | kurdisch |
| (ckc) | | | I/L | Cakchiquel | | Cakchiquel, Northern | | | | | |
| (ckd) | | | I/L | Cakchiquel | | Cakchiquel, South Central | | | | | |
| (cke) | | | I/L | Cakchiquel | | Cakchiquel, Eastern | | | | | |
| (ckf) | | | I/L | Cakchiquel | | Cakchiquel, Southern | | | | | |
| ckh | | | I/L | | | Chak | | | | | |
| (cki) | | | I/L | Cakchiquel | | Cakchiquel, Santa María De Jesús | | | | | |
| (ckj) | | | I/L | Cakchiquel | | Cakchiquel, Santo Domingo Xenacoj | | | | | |
| (ckk) | | | I/L | Cakchiquel | | Cakchiquel, Acatenango Southwestern | | | | | |
| ckl | | | I/L | | | Cibak | | | | | |
| ckm | | | I/L | Indo-European | | Chakavian | | | | | |
| ckn | | | I/L | | | Kaang Chin | | | | | |
| cko | | | I/L | | | Anufo | | | | | |
| ckq | | | I/L | | | Kajakse | | | | | |
| ckr | | | I/L | | | Kairak | | | | | |
| cks | | | I/L | | | Tayo | | | | | |
| ckt | | | I/L | | чаучу | Chukot | | | 楚科奇语 | | Tschuktschisch |
| cku | | | I/L | | | Koasati | | koasati | | | |
| ckv | | | I/L | | | Kavalan | kavalan | | 噶玛兰语 | | Kavalanisch |
| (ckw) | | | I/L | | | Cakchiquel, Western | | | | | |
| ckx | | | I/L | | | Caka | | | | | |
| cky | | | I/L | | | Cakfem-Mushere | | | | | |
| ckz | | | I/L | | | Cakchiquel-Quiché Mixed Language | | | | | |
| cla | | | I/L | | | Ron | | | | | |
| clc | | | I/L | | Tšinlhqot⤙in, Tsilhqot’in | Chilcotin | chilcotin | | 奇尔科廷语 | | |
| cld | | | I/L | | ܟܠܕܝܐ | Chaldean Neo-Aramaic | | | | | |
| cle | | | I/L | | | Chinantec, Lealao | | | | | |
| clh | | | I/L | | | Chilisso | | | | | |
| cli | | | I/L | | | Chakali | | | | | |
| clj | | | I/L | | | Laitu Chin | | | | | |
| clk | | | I/L | | | Idu-Mishmi | | | 义都语; 义都-珞巴语 | | |
| cll | | | I/L | | | Chala | | | | | |
| clm | | | I/L | Salishan | nəxʷsƛʼayʼəmʼúcən | Clallam, Klallam | | | 克拉兰语 | | |
| clo | | | I/L | | | Chontal, Lowland Oaxaca | | | 低地琼塔尔语 | | |
| clt | | | I/L | | | Lautu Chin | | | | | |
| clu | | | I/L | | | Caluyanun | | | | | |
| clw | | | I/L | | | Chulym | | | 楚利姆语 | | |
| cly | | | I/L | | | Chatino, Eastern Highland | | chatino de la zona alta oriental | | | |
| cma | | | I/L | | | Maa | | | | | |
| cme | | | I/L | | | Cerma | | | | | |
| cmg | | | I/H | | | Mongolian, Classical | | | 古典蒙古语 | | mongolisch (klassisch) |
| cmi | | | I/L | | | Emberá-Chamí | | | | | |
| (cmk) | | | I/E | | | Chimakum | | | | | |
| cml | | | I/L | | | Campalagian | | | | | |
| cmm | | | I/E | | | Michigamea | | | | | |
| cmn | | | I/L | Chinese | 官話; 北方話 | Mandarin Chinese | | chino mandarín | 官話 | | |
| cmo | | | I/L | | | Mnong, Central | | | 中孟语 | | |
| cmr | | | I/L | | | Chin, Mro | | | | | |
| cms | | | I/A | | | Messapic | | | | | |
| cmt | | | I/L | | | Camtho | | | | | |
| cna | | | I/L | | | Changthang | | | | | |
| cnb | | | I/L | | | Chin, Chinbon | | | | | |
| cnc | | | I/L | | | Côông | | | | | |
| cng | | | I/L | | | Qiang, Northern | | | 北羌语 | | |
| cnh | | | I/L | | | Chin, Lai | | | | | |
| cni | | | I/L | | | Asháninka | | | | | |
| cnk | | | I/L | | | Chin, Khumi | | | | | |
| cnl | | | I/L | | | Chinantec, Lalana | | | | | |
| (cnm) | | | I/L | | | Chuj, Ixtatán | | | | | |
| cno | | | I/L | | | Con | | | | | |
| cnp | | | I/L | Sino-Tibetan | | Northern Ping Chinese, Northern Pinghua | | | | | |
| cnq | | | I/L | Niger–Congo | | Chung | | | | | |
| cnr | | cnr | I/L | Indo-European | crnogorski / црногорски | Montenegrin | monténégrin | montenegrino | 蒙特内哥罗语 | черногорский | Montenegrinisch |
| cns | | | I/L | | | Asmat, Central | | | | | |
| cnt | | | I/L | | | Chinantec, Tepetotutla | | | | | |
| cnu | | | I/L | | | Chenoua | | | | | |
| cnw | | | I/L | | | Chin, Ngawn | | | | | |
| cnx | | | I/H | | | Cornish, Middle | | | 中古康沃尔语 | | |
| coa | | | I/L | | | Malay, Cocos Islands | | | | | |
| cob | | | I/E | | | Chicomuceltec | | | | | |
| coc | | | I/L | | Kwikapa | Cocopa | | | | | |
| cod | | | I/L | | | Cocama-Cocamilla | | cocama-cocamilla | | | |
| coe | | | I/L | | | Koreguaje | | | | | |
| cof | | | I/L | | | Colorado | | colorado | | | |
| cog | | | I/L | | | Chong | | | | | |
| coh | | | I/L | | | Chonyi | | | | | |
| coj | | | I/E | | Tipai | Cochimi | | cochimí | | | |
| cok | | | I/L | | | Cora, Santa Teresa | | | | | |
| col | | | I/L | | | Columbia-Wenatchi | | | | | |
| com | | | I/L | | nʉmʉ tekwapʉ̱ | Comanche | comanche | | 科曼切语 | | |
| con | | | I/L | | | Cofán | | cofán | | | |
| coo | | | I/L | | Saɬuɬtxʷ | Comox | | | 科莫克斯语 | | |
| cop | | cop | I/E | | ⲙⲉⲧⲛ̀ⲣⲉⲙⲛ̀ⲭⲏⲙⲓ | Coptic | copte | copto | 科普特语 | коптский | Koptisch |
| coq | | | I/E | | | Coquille | coquille | | | | |
| cor | kw | cor | I/L | Indo-European | Kernewek | Cornish | cornique | córnico | 康沃尔语; 康瓦尔语 | корнский | Kornisch |
| cos | co | cos | I/L | Indo-European | corsu | Corsican | corse | corso | 科西嘉语 | корсиканский | Korsisch |
| cot | | | I/L | | | Caquinte | | | | | |
| cou | | | I/L | | | Wamey | | | | | |
| cov | | | I/L | | | Cao Miao | cao miao | | 草苗语 | | |
| cow | | | I/E | | | Cowlitz | | | 考利茨语 | | |
| cox | | | I/L | | | Nanti | | | | | |
| (coy) | | | I/E | | | Coyaima | | | | | |
| coz | | | I/L | | | Chochotec | | chocho | | | |
| cpa | | | I/L | | | Chinantec, Palantla | | | | | |
| cpb | | | I/L | | | Ashéninka, Ucayali-Yurúa | | | | | |
| cpc | | | I/L | | | Ajyíninka Apurucayali | | | | | |
| cpg | | | I/E | | | Greek (Cappadocian) | | | 卡帕多细亚希腊语 | | Griechisch (?) |
| cpi | | | I/L | | | Chinese Pidgin English | | | | | |
| cpn | | | I/L | | | Cherepon | | | | | |
| cpo | | | I/L | | | Kpeego | | | | | |
| cps | | | I/L | | | Capiznon | | | | | |
| cpu | | | I/L | | | Ashéninka, Pichis | | | | | |
| cpx | | | I/L | Chinese | | Pu-Xian Chinese | | | 莆仙話 | | |
| cpy | | | I/L | | | Ashéninka, South Ucayali | | | | | |
| cqd | | | I/L | | | Chuanqiandian Cluster Miao | | | 川黔滇苗话 | | |
| (cqu) | | | I/L | | | Quechua, Chilean | | | | | |
| cra | | | I/L | | | Chara | | | | | |
| crb | | | I/E | | | Carib, Island | | | | | |
| crc | | | I/L | | | Lonwolwol | | | | | |
| crd | | | I/L | | | Coeur d'Alene | | | | | |
| cre | cr | cre | M/L | Cree | ᓀᐦᐃᔭᐤ (Nehiyāw) | Cree | cree | cree | 克里语 | | |
| crf | | | I/E | | | Caramanta | | | | | |
| crg | | | I/L | | | Michif | | | | | |
| crh | | crh | I/L | | Къырым Татар | Crimean Tatar | tatar de Crimé | tártaro de Crimea | 克里米亚鞑靼语 | крымскотатарский | Krimtatarisch |
| cri | | | I/L | | | Sãotomense | | | | | |
| crj | | | I/L | Cree | | East Cree (Southern) | | | | | |
| crk | | | I/L | Cree | | Cree (Plains) | | | | | |
| crl | | | I/L | Cree | | East Cree (Northern) | | | | | |
| crm | | | I/L | Cree | | Cree (Moose) | | | | | |
| crn | | | I/L | | | Cora, El Nayar | | | | | |
| cro | | | I/L | | | Crow | crow | crow | 克劳语 | | |
| crq | | | I/L | | | Chorote, Iyo'wujwa | | | | | |
| crr | | | I/E | | | Carolina Algonquian | | | | | |
| crs | | | I/L | | | Seselwa Creole French | | | | | |
| crt | | | I/L | | | Chorote, Iyojwa'ja | | | | | |
| (cru) | | | I/E | | | Carútana | | | | | |
| crv | | | I/L | | | Chaura | | | | | |
| crw | | | I/L | | | Chrau | | | | | |
| crx | | | I/L | | ᑕᗸᒡ | Carrier | carrier | | | | |
| cry | | | I/L | | | Cori | | | | | |
| crz | | | I/E | | | Cruzeño | | | | | |
| csa | | | I/L | | | Chinantec, Chiltepec | | | | | |
| csb | | csb | I/L | | kaszëbsczi | Kashubian | cachoube | casubio | 卡舒比语 | кашубский | Kaschubisch |
| csc | | | I/L | | | Catalan Sign Language | | | 加泰罗尼亚手语 | | Katalonische Zeichensprache |
| csd | | | I/L | | | Chiangmai Sign Language | | | 清迈手语 | | |
| cse | | | I/L | | | Czech Sign Language | | | 捷克手语 | | Tscechische Zeichensprache |
| csf | | | I/L | | | Cuba Sign Language | | | 古巴手语 | | |
| csg | | | I/L | | | Chilean Sign Language | | | 智利手语 | | Chilenische Zeichensprache |
| csh | | | I/L | | | Chin, Asho | | | | | |
| csi | | | I/E | | | Miwok, Coast | | miwok costanoano | | | |
| csj | | | I/L | | | Songlai Chin | | | | | |
| csk | | | I/L | | | Jola-Kasa | | | | | |
| csl | | | I/L | | | Chinese Sign Language | | | 中国手语 | | Chinesische Zeichensprache |
| csm | | | I/L | | | Miwok, Central Sierra | | | | | |
| csn | | | I/L | | | Colombian Sign Language | | | 哥伦比亚手语 | | Kolumbische Zeichensprache |
| cso | | | I/L | | | Chinantec, Sochiapan | | | | | |
| csp | | | I/L | Sino-Tibetan | | Southern Ping Chinese, Southern Pinghua | | | | | |
| csq | | | I/L | | | Croatia Sign Language | | | 克罗地亚手语 | | Kroatische Zeichensprache |
| csr | | | I/L | | | Costa Rican Sign Language | | | 哥斯达黎加手语 | | Costa Ricanische Zeichensprache |
| css | | | I/E | | | Ohlone (Southern) | | | | | |
| cst | | | I/L | | | Ohlone (Northern) | | | | | |
| csv | | | I/L | | | Sumtu Chin | | | | | |
| csw | | | I/L | Cree | | Cree (Swampy) | | | | | |
| csx | | | I/L | | | Cambodian Sign Language | | | | | |
| csy | | | I/L | | | Chin, Siyin | | | | | |
| csz | | | I/L | | | Coos | | coos | | | |
| cta | | | I/L | | | Chatino, Tataltepec | | chatino de Tataltepec | | | |
| ctc | | | I/E | | | Chetco | | | | | |
| ctd | | | I/L | | | Chin, Tedim | | | | | |
| cte | | | I/L | | | Chinantec, Tepinapa | | | | | |
| ctg | | | I/L | | | Chittagonian | | | 吉大港语 | | |
| cth | | | I/L | | | Thaiphum Chin | | | | | |
| (cti) | | | I/L | | | Chol, Tila | | | | | |
| ctl | | | I/L | | | Chinantec, Tlacoatzintepec | | | | | |
| ctm | | | I/E | | | Chitimacha | chitimacha | | | | |
| ctn | | | I/L | | | Chhintange | | | | | |
| cto | | | I/L | | | Emberá-Catío | | | | | |
| ctp | | | I/L | | | Chatino, Western Highland | | chatino de la zona alta occidental | | | |
| cts | | | I/L | | | Bicolano, Northern Catanduanes | | | | | |
| ctt | | | I/L | | | Wayanad Chetti | | | | | |
| ctu | | | I/L | | | Chol, Tumbalá | | | | | |
| cty | | | I/L | Dravidian | | Moundadan Chetty | | | | | |
| ctz | | | I/L | | | Chatino, Zacatepec | | chatino de Zacatepec | | | |
| cua | | | I/L | | | Cua | | | | | |
| cub | | | I/L | | | Cubeo | | cubeo | | | |
| cuc | | | I/L | | | Chinantec, Usila | | | | | |
| (cug) | | | I/L | | | Cung | | | | | |
| cuh | | | I/L | | | Chuka | | | | | |
| cui | | | I/L | | | Cuiba | | cuiba | | | |
| cuj | | | I/L | | | Mashco Piro | | | | | |
| cuk | | | I/L | | | Kuna, San Blas | | | | | |
| cul | | | I/L | | | Culina | | | | | |
| (cum) | | | I/E | spurious language | | Cumeral | | | | | |
| (cun) | | | I/L | | | Quiché, Cunén | | | | | |
| cuo | | | I/E | | | Cumanagoto | | cumanagoto | | | |
| cup | | | I/E | | Kuupangaxwichem | Cupeño | cupeno | cupeño | | | |
| cuq | | | I/L | | | Cun | | | 村语 | | |
| cur | | | I/L | | | Chhulung | | | | | |
| cut | | | I/L | | | Cuicatec, Teutila | | | | | |
| cuu | | | I/L | | | Tai Ya | | | 傣雅语 | | |
| cuv | | | I/L | | | Cuvok | | | | | |
| cuw | | | I/L | | | Chukwa | | | | | |
| cux | | | I/L | | | Cuicatec, Tepeuxila | | | | | |
| cuy | | | I/L | isolate | | Cuitlatec | | | | | |
| cvg | | | I/L | | | Chug | | | | | |
| cvn | | | I/L | | | Chinantec, Valle Nacional | | | | | |
| cwa | | | I/L | | | Kabwa | | | | | |
| cwb | | | I/L | | | Maindo | | | | | |
| cwd | | | I/L | Cree | | Cree (Woods) | | | | | |
| cwe | | | I/L | | | Kwere | | | | | |
| cwg | | | I/L | | | Chewong | | | | | |
| cwt | | | I/L | | | Kuwaataay | | | | | |
| cxh | | | I/L | Afro-Asiatic | | Cha'ari | | | | | |
| cya | | | I/L | | | Chatino, Nopala | | chatino de Nopala | | | |
| cyb | | | I/E | | | Cayubaba | | | | | |
| cym | cy | wel | I/L | Indo-European | Cymraeg | Welsh | gallois | galés | 威尔士语; 威尔斯语 | валлийский | Walisisch |
| cyo | | | I/L | | | Cuyonon | | | | | |
| czh | | | I/L | Chinese | 徽州话 | Huizhou Chinese | | | 徽語 | | chinesisch (Huizhou) |
| czk | | | I/E | | | Knaanic | | | 迦南语; 犹太-斯拉夫语 | | |
| czn | | | I/L | | | Chatino, Zenzontepec | | chatino de Zenzontepec | | | |
| czo | | | I/L | Chinese | | Min Zhong Chinese | | | 閩中話 | | chinesisch (Min Zhong) |
| czt | | | I/L | | | Chin, Zotung | | | | | |