C - D
| Englische Sprachbezeichnung | Deutsche Sprachbezeichnung | 639.2 | 639.1 |
|---|---|---|---|
| Caddo | Caddo-Sprachen | cad | |
| Castilian; Spanish | Spanisch | spa | es |
| Catalan; Valencian | Katalanisch | cat | ca |
| Caucasian (Other) | Andere kaukasische Sprachen | cau | |
| Cebuano | Cebuano | ceb | |
| Celtic (Other) | Andere keltische Sprachen | cel | |
| Central American Indian (Other) | Andere Indianersprachen (Zentralamerika) | cai | |
| Central Khmer | Kambodschanisch | khm | km |
| Chagatai | Tschagataisch | chg | |
| Chamic languages | Cham-Sprachen | cmc | |
| Chamorro | Chamorro-Sprache | cha | ch |
| Chechen | Tschetschenisch | che | ce |
| Cherokee | Cherokee-Sprache | chr | |
| Chewa; Chichewa; Nyanja | Nyanja-Sprache | nya | ny |
| Cheyenne | Cheyenne-Sprache | chy | |
| Chibcha | Chibcha-Sprachen | chb | |
| Chichewa; Chewa; Nyanja | Nyanja-Sprache | nya | ny |
| Chinese | Chinesisch | chi/zho | zh |
| Chinook jargon | Chinook-Jargon | chn | |
| Chipewyan; Dene Suline | Chipewyan | chp | |
| Choctaw | Choctaw-Sprache | cho | |
| Chuang; Zhuang | Zhuang | zha | za |
| Church Slavic; Slavonic; Church Slavonic; Old Bulgarian; Old Church Slavonic | Kirchenslawisch | chu | cu |
| Chuukese | Trukesisch | chk | |
| Chuvash | Tschuwaschisch | chv | cv |
| Classical Nepal Bhasa; Classical Newari; Old Newari | Alt-Newari | nwc | |
| Classical Syriac | syc | ||
| Coptic | Koptisch | cop | |
| Cornish | Kornisch | cor | kw |
| Corsican | Korsisch | cos | co |
| Cree | Cree-Sprache | cre | cr |
| Creek | Muskogisch | mus | |
| Creoles and pidgins (Other) | Kreolische Sprachen (Pidgin-Sprachen) | crp | |
| Creoles and pidgins, English-based (Other) | Kreolisch-Englisch | cpe | |
| Creoles and pidgins, French-based (Other) | Kreolisch-Französisch (Andere) | cpf | |
| Creoles and pidgins, Portuguese-based (Other) | Kreolisch-Portugiesisch (Andere) | cpp | |
| Crimean Tatar; Crimean Turkish | Krimtatarisch | crh | |
| Croatian | Kroatisch | hrv/scr | hr |
| Cushitic (Other) | Andere kuschitische Sprachen | cus | |
| Czech | Tschechisch | cze/ces | cs |
| Dakota | Dakota-Sprache | dak | |
| Danish | Dänisch | dan | da |
| Dargwa | Darginisch | dar | |
| Delaware | Delaware-Sprache | del | |
| Dinka | Dinka-Sprache | din | |
| Divehi, Dhivehi, Maldivian | Maledivisch | div | dv |
| Dogri | Dogri | doi | |
| Dogrib | Dogrib-Sprache | dgr | |
| Dravidian (Other) | Andere drawidische Sprachen | dra | |
| Duala | Duala-Sprachen | dua | |
| Dutch; Flemish | Niederländisch | dut/nld | nl |
| Dutch, Middle (ca. 1050-1350) | Mittelniederländisch (ca. 1050-1350) | dum | |
| Dyula | Dyula-Sprache | dyu | |
| Dzongkha | Dzongkha | dzo | dz |