| Prio | Original string | Translation | — |
|---|---|---|---|
| Christmas Island | Vánoční ostrov | Details | |
| Cocos [Keeling] Islands | Kokosové ostrovy | Details | |
| Colombia | Kolumbie | Details | |
| Comoros | Komory | Details | |
| Congo - Brazzaville | Kongo - Brazzaville | Details | |
| Congo - Kinshasa | Kongo - Kinshasa | Details | |
| Cook Islands | Cookovy ostrovy | Details | |
| Costa Rica | Kostarika | Details | |
| Croatia | Chorvatsko | Details | |
| Cuba | Kuba | Details | |
| Cyprus | Kypr | Details | |
| Czech Republic | Česká republika | Details | |
| Côte d’Ivoire | Pobřeží slonoviny | Details | |
| Denmark | Dánsko | Details | |
| Djibouti | Džibutsko | Details | |
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