| Language | Name | Code |
|---|---|---|
| Afrikaans | Joensuu | af |
| Arabic | يوينسو | ar |
| arz | يوينسو | arz |
| Asturian | Joensuu | ast |
| avk | Joensuu | avk |
| Aymara | Joensuu | ay |
| Belarusian | Ёэнсу | be |
| be-tarask | Ёэнсуў | be-tarask |
| Bulgarian | Йоенсуу | bg |
| Bengali | ইয়োয়েনসু | bn |
| Catalan | Joensuu | ca |
| Cebuano | Joensuu | ceb |
| Czech | Joensuu | cs |
| Danish | Joensuu | da |
| German | Joensuu | de |
| diq | Joensuu | diq |
| Modern Greek (1453-) | Γιόενσουου | el |
| English | Joensuu | en |
| Esperanto | Joensuu | eo |
| Spanish | Joensuu | es |
| Estonian | Joensuu linn | et |
| Basque | Joensuu | eu |
| Persian | یوئنسو | fa |
| Finnish | Joensuu | fi |
| Fijian | Joensuu | fj |
| French | Joensuu | fr |
| frr | Joensuu | frr |
| Irish | Joensuu | ga |
| Galician | Joensuu | gl |
| Gujarati | જોયેનસુ | gu |
| Hebrew | יואנסו | he |
| Hindi | जोइनसू | hi |
| Hungarian | Joensuu | hu |
| Armenian | Յոենսուու | hy |
| Interlingua (International Auxiliary Language Association) | Joensuu | ia |
| Indonesian | Joensuu | id |
| Interlingue | Joensuu | ie |
| Ido | Joensuu | io |
| Icelandic | Joensuu | is |
| Italian | Joensuu | it |
| Japanese | ヨエンスー | ja |
| Georgian | იოენსუუ | ka |
| Kalaallisut | Joensuu | kl |
| Kannada | ಜೋಎನ್ಸೂಯು | kn |
| Korean | 요엔수 | ko |
| koi | Ёэнсу | koi |
| Cornish | Joensuu | kw |
| Latin | Ostia Carelorum | la |
| lmo | Joensuu | lmo |
| Lithuanian | Joensū | lt |
| Latvian | Joensū | lv |
| mdf | Йоэнсуу | mdf |
| Maori | Joensuu | mi |
| Marathi | जोएनसूयू | mr |
| mrj | Йоэнсуу | mrj |
| Malay (macrolanguage) | Joensuu | ms |
| mul | Joensuu | mul |
| myv | Йоэнсу ош | myv |
| Nauru | Joensuu | na |
| Norwegian Bokmål | Joensuu | nb |
| Dutch | Joensuu | nl |
| Norwegian Nynorsk | Joensuu | nn |
| Livvi | Jovensuu | olo |
| Ossetian | Йоэнсуу | os |
| Polish | Joensuu | pl |
| pms | Joensuu | pms |
| pnb | جوئنسو | pnb |
| Portuguese | Joensuu | pt |
| rmf | Bekkosko muijako fooros | rmf |
| Romanian | Joensuu | ro |
| Russian | Йоэнсуу | ru |
| Scots | Joensuu | sco |
| Northern Sami | Joensuu | se |
| sh | Joensuu | sh |
| Sinhala | ජෝසෙන්සු | si |
| sje | Joensuu | sje |
| sju | Joensuu | sju |
| Slovak | Joensuu | sk |
| Slovenian | Joensuu | sl |
| sma | Joensuu | sma |
| smj | Joensuu | smj |
| smn | Joensuu | smn |
| sms | Joensuu | sms |
| Albanian | Joensuu | sq |
| Serbian | Јоенсу | sr |
| sr-ec | Јоенсу | sr-ec |
| sr-el | Joensu | sr-el |
| Swedish | Joensuu | sv |
| szl | Joensuu | szl |
| Tamil | ஜோஹென்ஸு | ta |
| Telugu | జొఎన్సు | te |
| Thai | โจเอินซู | th |
| Turkish | Joensuu | tr |
| Tatar | Йоэнсуу | tt |
| tum | Joensuu | tum |
| Ukrainian | Йоенсуу | uk |
| Urdu | یوئنسو | ur |
| Uzbek | Joensuu | uz |
| vep | Jogensu | vep |
| Vietnamese | Joensuu | vi |
| war | Joensuu | war |
| Wu Chinese | 约恩苏 | wuu |
| yue | 約恩蘇 | yue |
| Chinese | 约恩苏 | zh |
| zh-cn | 约恩苏 | zh-cn |
| zh-hans | 约恩苏 | zh-hans |
| zh-hant | 約恩蘇 | zh-hant |
| zh-hk | 約恩蘇 | zh-hk |
| zh-sg | 约恩苏 | zh-sg |
| zh-tw | 約恩蘇 | zh-tw |