| Language | Name | Code |
|---|---|---|
| ace | Haikou | ace |
| Afrikaans | Haikou | af |
| Arabic | هايكو | ar |
| Asturian | Haikou | ast |
| Azerbaijani | Haykou | az |
| Belarusian | Хайкоу | be |
| Bulgarian | Хайкоу | bg |
| Bengali | হাইখৌ | bn |
| Tibetan | ཧའེ་ཁོའུ་གྲོང་ཁྱེར། | bo |
| Breton | Haikou | br |
| Bosnian | Haikou | bs |
| Catalan | Haikou | ca |
| cdo | Hāi-kāu | cdo |
| Cebuano | Haikou | ceb |
| Czech | Chaj-kchou | cs |
| Chuvash | Хайкоу | cv |
| Welsh | Haikou | cy |
| Danish | Haikou | da |
| German | Haikou | de |
| Modern Greek (1453-) | Χαϊκού | el |
| English | Haikou | en |
| en-ca | Haikou | en-ca |
| en-gb | Haikou | en-gb |
| Esperanto | Hajkoŭo | eo |
| Spanish | Haikou | es |
| Estonian | Haikou | et |
| Basque | Haikou | eu |
| Persian | هایکو (شهر) | fa |
| Finnish | Haikou | fi |
| French | Haikou | fr |
| frr | Haikou | frr |
| Irish | Haikou | ga |
| gan | 海口市 | gan |
| gan-hans | 海口市 | gan-hans |
| gan-hant | 海口市 | gan-hant |
| Galician | Haikou | gl |
| Gujarati | હાઈકૌ | gu |
| hak | Hói-khiéu-sṳ | hak |
| Hebrew | האיקואו | he |
| Hindi | हाइकोऊ | hi |
| Croatian | Haikou | hr |
| Hungarian | Hajkou | hu |
| Armenian | Հայկոու | hy |
| Indonesian | Haikou | id |
| Interlingue | Haikou | ie |
| Icelandic | Haikou | is |
| Italian | Haikou | it |
| Japanese | 海口市 | ja |
| Georgian | ჰაიკოუ | ka |
| Kikuyu | Haikou | ki |
| kk-cyrl | Хайкоу | kk-cyrl |
| Kannada | ಹೈಕೌ | kn |
| Korean | 하이커우시 | ko |
| Kurdish | Haikou | ku |
| Latin | Haikou | la |
| Lithuanian | Haikou | lt |
| Latvian | Haikou | lv |
| lzh | 海口市 | lzh |
| Malagasy | Haikou | mg |
| Macedonian | Хајкоу | mk |
| Mongolian | Хайкоу | mn |
| Marathi | हाइखौ | mr |
| Malay (macrolanguage) | Haikou | ms |
| Burmese | ဟိုင်းခိုမြို့ | my |
| nan | Hái-kháu-chhī | nan |
| Norwegian Bokmål | Haikou | nb |
| Dutch | Haikou | nl |
| Norwegian Nynorsk | Haikou | nn |
| Occitan (post 1500) | Haikou | oc |
| Ossetian | Хайкоу | os |
| Pampanga | Haikou | pam |
| Polish | Haikou | pl |
| pnb | ہائیکؤ | pnb |
| Portuguese | Haikou | pt |
| Quechua | Haikou | qu |
| Russian | Хайкоу | ru |
| sah | Хайкоу | sah |
| Scots | Haikou | sco |
| sh | Haikou | sh |
| Sinhala | හයිකෝ | si |
| Slovak | Chaj-kchou | sk |
| Slovenian | Haikou | sl |
| Albanian | Haikou | sq |
| Serbian | Хајкоу | sr |
| Swedish | Haikou | sv |
| Swahili (macrolanguage) | Haikou | sw |
| Tamil | ஹைகோ | ta |
| Telugu | హైకోవ్ | te |
| tg-cyrl | Ҳайкоу | tg-cyrl |
| Thai | ไหโข่ว | th |
| Turkmen | Haýiku | tk |
| Tagalog | Haikou | tl |
| Turkish | Haikou | tr |
| Uighur | Xeyko shehir | ug |
| Ukrainian | Хайкоу | uk |
| Urdu | ہائکو | ur |
| Uzbek | Xaykou | uz |
| vec | Haikou | vec |
| Vietnamese | Hải Khẩu | vi |
| war | Haikou | war |
| Wu Chinese | 海口市 | wuu |
| wuu-hans | 海口市 | wuu-hans |
| wuu-hant | 海口市 | wuu-hant |
| xmf | ჰაიკოუ | xmf |
| yue | 海口 | yue |
| Zhuang | Haijgouj | za |
| Chinese | 海口市 | zh |
| zh-cn | 海口市 | zh-cn |
| zh-hans | 海口市 | zh-hans |
| zh-hant | 海口市 | zh-hant |
| zh-hk | 海口 | zh-hk |
| zh-mo | 海口市 | zh-mo |
| zh-my | 海口市 | zh-my |
| zh-sg | 海口市 | zh-sg |
| zh-tw | 海口市 | zh-tw |