| Language | Name | Code |
|---|---|---|
| Afrikaans | Irkoetsk | af |
| Arabic | إيركوتسك | ar |
| arz | ايركوتسك | arz |
| avk | Irkutsk | avk |
| Azerbaijani | İrkutsk | az |
| azb | ایرکوتسک | azb |
| Bashkir | Иркутск | ba |
| Belarusian | Іркуцк | be |
| be-tarask | Іркуцк | be-tarask |
| Bulgarian | Иркутск | bg |
| Bengali | ইর্কুতস্ক | bn |
| Breton | Irkoutsk | br |
| Bosnian | Irkutsk | bs |
| bxr | Эрхүү | bxr |
| Catalan | Irkutsk | ca |
| Chechen | Иркутск | ce |
| Cebuano | Irkutsk (kapital sa lalawigan sa Rusya) | ceb |
| crh | İrkutsk | crh |
| Czech | Irkutsk | cs |
| csb | Irkùck | csb |
| Church Slavic | Иркоутьскъ | cu |
| Chuvash | Иркутск | cv |
| Welsh | Irkutsk | cy |
| Danish | Irkutsk | da |
| German | Irkutsk | de |
| de-ch | Irkutsk | de-ch |
| dsb | Irkutsk | dsb |
| Modern Greek (1453-) | Ιρκούτσκ | el |
| English | Irkutsk | en |
| Esperanto | Irkutsk | eo |
| Spanish | Irkutsk | es |
| Estonian | Irkutsk | et |
| Basque | Irkutsk | eu |
| Persian | ایرکوتسک | fa |
| Finnish | Irkutsk | fi |
| French | Irkoutsk | fr |
| frr | Irkutsk | frr |
| Western Frisian | Irkûtsk | fy |
| Irish | Irkutsk | ga |
| Galician | Irkutsk | gl |
| Gujarati | ઈરકુત્સ્ક | gu |
| Hausa | Irkutsk | ha |
| Hebrew | אירקוטסק | he |
| Hindi | इरकुत्स्क | hi |
| Croatian | Irkutsk | hr |
| Upper Sorbian | Irkutsk | hsb |
| Hungarian | Irkutszk | hu |
| Armenian | Իրկուտսկ | hy |
| Indonesian | Irkutsk | id |
| Ido | Irkutsk | io |
| Icelandic | Írkúsk | is |
| Italian | Irkutsk | it |
| Japanese | イルクーツク | ja |
| Georgian | ირკუტსკი | ka |
| kk-cyrl | Иркутск | kk-cyrl |
| Kannada | ಇರ್ಕುಟ್ಸ್ಕ್ | kn |
| Korean | 이르쿠츠크 | ko |
| Komi | Иркутск | kv |
| Kirghiz | Иркутск | ky |
| Latin | Ircutia | la |
| Luxembourgish | Irkutsk | lb |
| lld | Irkutsk | lld |
| Lithuanian | Irkutskas | lt |
| Latvian | Irkutska | lv |
| mdf | Иркутск | mdf |
| mhr | Иркутск | mhr |
| Macedonian | Иркутск | mk |
| Mongolian | Эрхүү | mn |
| Marathi | इरकुत्स्क | mr |
| Malay (macrolanguage) | Irkutsk | ms |
| myv | Иркутской ош | myv |
| nan | Irkutsk | nan |
| Norwegian Bokmål | Irkutsk | nb |
| Dutch | Irkoetsk | nl |
| Norwegian Nynorsk | Irkutsk | nn |
| Occitan (post 1500) | Irkutsk | oc |
| Ossetian | Иркутск | os |
| Polish | Irkuck | pl |
| pnb | ارکٹسک | pnb |
| Portuguese | Irkutsk | pt |
| pt-br | Irkutsk | pt-br |
| Romanian | Irkutsk | ro |
| Russian | Иркутск | ru |
| sah | Иркутскай | sah |
| Sicilian | Irkutsk | scn |
| Scots | Irkutsk | sco |
| sh | Irkutsk | sh |
| Sinhala | ඉර්කුට්ස්ක් | si |
| Slovak | Irkutsk | sk |
| Slovenian | Irkutsk | sl |
| smn | Irkutsk | smn |
| Albanian | Irkuck | sq |
| Serbian | Иркутск | sr |
| sr-ec | Иркутск | sr-ec |
| Swedish | Irkutsk | sv |
| Swahili (macrolanguage) | Irkutsk | sw |
| szl | Irkutsk | szl |
| Tamil | இர்கூட்ஸ்க் | ta |
| Telugu | ఇర్కూట్స్క్ | te |
| Tajik | Иркутск | tg |
| tg-cyrl | Иркутск | tg-cyrl |
| Thai | อีร์คุตสค์ | th |
| Turkmen | Irkutsk | tk |
| Tagalog | Irkutsk | tl |
| tly | İrkutsk | tly |
| Turkish | İrkutsk | tr |
| Tatar | Иркутск | tt |
| tum | Irkutsk | tum |
| tyv | Иркутск | tyv |
| udm | Иркутск | udm |
| Ukrainian | Іркутськ | uk |
| Urdu | ایرکتسک | ur |
| Uzbek | Irkutsk | uz |
| vec | Irkutsk | vec |
| vep | Irkutsk | vep |
| Vietnamese | Irkutsk | vi |
| Walloon | Irkoutsk | wa |
| war | Irkutsk | war |
| Wolof | Irkutsk | wo |
| Wu Chinese | 伊尔库茨克 | wuu |
| xmf | ირკუტსკი | xmf |
| Yiddish | אירקוצק | yi |
| yue | 伊爾庫茨克 | yue |
| Chinese | 伊尔库茨克 | zh |
| zh-cn | 伊尔库茨克 | zh-cn |
| zh-hans | 伊尔库茨克 | zh-hans |
| zh-hant | 伊爾庫次克 | zh-hant |
| zh-hk | 伊爾庫次克 | zh-hk |
| zh-tw | 伊爾庫次克 | zh-tw |