| Prio | Original string | Translation | — | 
|---|---|---|---|
| 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 | |
| Dominica | Dominika | Details | |
| Dominican Republic | Dominikánská republika | Details | |
| Dronning Maud Land | Dronning Maud Land | Details | |
| East Germany | Východní Německo | Details | |
| Ecuador | Ekvádor | Details | |
| Egypt | Egypt | Details | |
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