| Prio | Original string | Translation | — |
|---|---|---|---|
| Cameroon | Camarões | Details | |
| Canada | Canadá | Details | |
| Canton and Enderbury Islands | Ilhas Canton e Enderbury | Details | |
| Cape Verde | Cabo Verde | Details | |
| Cayman Islands | Ilhas Cayman | Details | |
| Central African Republic | República Centro-Africana | Details | |
| Chad | Chade | Details | |
| Chile | Chile | Details | |
| China | China | Details | |
| Christmas Island | Ilha do Natal | Details | |
| Cocos [Keeling] Islands | Ilhas Cocos [Keeling] | Details | |
| Colombia | Colômbia | Details | |
| Comoros | Comores | Details | |
| Congo - Brazzaville | Congo - Brazzaville | Details | |
| Congo - Kinshasa | Congo - Kinshasa | Details | |
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