| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Chuvash | Turkic | чӑваш чӗлхи | cv | chv | chv | chv | ||
| Cornish | Indo-European | Kernewek | kw | cor | cor | cor | ||
| Corsican | Indo-European | corsu; lingua corsa | co | cos | cos | cos | ||
| Cree | Algonquian | ᓀᐦᐃᔭᐍᐏᐣ | cr | cre | cre | cre + 6 | macrolanguage | |
| Czech | Indo-European | čeština; český jazyk | cs | ces | cze | ces | ||
| Danish | Indo-European | dansk | da | dan | dan | dan | ||
| Divehi | Dhivehi;Maldivian | Indo-European | ދިވެހި | dv | div | div | div | |
| Dutch | Flemish | Indo-European | Nederlands; Vlaams | nl | nld | dut | nld | |
| Dzongkha | Sino-Tibetan | རྫོང་ཁ | dz | dzo | dzo | dzo | ||
| English | Indo-European | English | en | eng | eng | eng |