| Language | Region | Translation | Remarks |
| Cambodian | Asia | Bon sro lanh oon | |
| Cambodian | Asia | kh_nhaum soro_lahn nhee_ah | |
| Canadian French | North America | Je t'aime | |
| Cantonese | Asia | Ngo Oi Lei | |
| Catalan | Europe | T'estim molt | I love you a lot |
| Catalan | Europe | T'estim | Mallorcan |
| Catalan | Europe | T'estime | Valencian |
| Catalan | Europe | T'estimo | Catalonian |
| Cayman | Carribean | You conch me out! | |
| Cayman | Carribean | I love You | |
| Cebuano | Asia | Gihigugma ko ikaw | |
| Chamorru | Oceania | Hu Guiya Hao | Guam ; Pronounced: who gwai-dza how |
| Cheyenne | North America | Néméhotâtse | |
| Chinese | Asia | wo aì ni | |
| Circassian | Europe | wise cas | |
| Circassian | Middle East | wise cas | |
| Corsican | Europe | Ti tengu caru | To male |
| Corsican | Europe | Ti tengu cara | To female |
| Creole | Africa | Mon kontan ou | |
| Creole | Carribean | mwen renmem'w | Haiti |
| Creole | Carribean | mwen damou'w | Haiti |
| Croatian | Europe | Volim te | |
| Czech | Europe | Miluji te | |
| Czech | Europe | Miluju Te! | Colloquial form |
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