| Language | Name | Code |
|---|---|---|
| Arabic | دنكان، كولومبيا البريطانية | ar |
| arz | دنكان | arz |
| Asturian | Duncan | ast |
| Azerbaijani | Dankan | az |
| Bengali | ডানকান | bn |
| Catalan | Duncan | ca |
| Cebuano | Duncan | ceb |
| Czech | Duncan | cs |
| Welsh | Duncan, British Columbia | cy |
| Danish | Duncan | da |
| German | Duncan | de |
| diq | Duncan, Britanya | diq |
| Modern Greek (1453-) | Ντάνκαν | el |
| English | Duncan | en |
| Spanish | Duncan | es |
| Persian | دانکن، بریتیش کلمبیا | fa |
| Finnish | Duncan | fi |
| French | Duncan | fr |
| Gujarati | ડંકન | gu |
| Hindi | डंकन | hi |
| Indonesian | Duncan | id |
| Italian | Duncan | it |
| Japanese | ダンカン | ja |
| Kannada | ಡಂಕನ್ | kn |
| Korean | 덩컨 | ko |
| Kurdish | Duncan | ku |
| Lithuanian | Dankanas | lt |
| Latvian | Dankana | lv |
| Marathi | डंकन | mr |
| Malay (macrolanguage) | Duncan | ms |
| Norwegian Bokmål | Duncan | nb |
| Dutch | Duncan | nl |
| Polish | Duncan (Kanada) | pl |
| Portuguese | Duncan (Colúmbia Britânica) | pt |
| Russian | Данкан | ru |
| Sinhala | ඩන්කන් | si |
| Slovak | Duncan | sk |
| Slovenian | Duncan | sl |
| Serbian | Данкан (Британска Колумбија) | sr |
| Swedish | Duncan | sv |
| Tamil | டுன்கேன் | ta |
| Telugu | డంకన్ | te |
| Thai | ดันแคน | th |
| Turkish | Duncan | tr |
| Ukrainian | Дункан | uk |
| Urdu | ڈنکن، برٹش کولمبیا | ur |
| Vietnamese | Duncan | vi |
| Volapük | Duncan (British Columbia) | vo |
| Chinese | 邓肯 | zh |