| Language | Name | Code |
|---|---|---|
| Abkhazian | Сеул | ab |
| ace | Seoul | ace |
| Afrikaans | Seoel | af |
| Amharic | ሶል | am |
| Aragonese | Seúl | an |
| ang | Seorabēol | ang |
| anp | सियोल | anp |
| Arabic | سول | ar |
| ary | سول | ary |
| arz | سول | arz |
| Assamese | ছিউল | as |
| Asturian | Seúl | ast |
| Azerbaijani | Seul | az |
| azb | سئول | azb |
| Bashkir | Сеул | ba |
| ban | Seoul | ban |
| bcl | Seoul | bcl |
| Belarusian | Сеул | be |
| be-tarask | Сэул | be-tarask |
| Bulgarian | Сеул | bg |
| bho | सियोल | bho |
| Bislama | Seoul | bi |
| bjn | Soul | bjn |
| blk | ဝေင်ꩻသိုး | blk |
| Bengali | সিউল | bn |
| Tibetan | སེ་ཨུལ། | bo |
| Breton | Seoul | br |
| Bosnian | Seul | bs |
| bxr | Соүль | bxr |
| Catalan | Seül | ca |
| cdo | Siū-ék | cdo |
| Chechen | Сеул | ce |
| Cebuano | Seoul | ceb |
| Central Kurdish | سیئۆل | ckb |
| Corsican | Seul | co |
| crh | Seul | crh |
| crh-latn | Seul | crh-latn |
| Czech | Soul | cs |
| csb | Seul | csb |
| Chuvash | Сеул | cv |
| Welsh | Seoul | cy |
| Danish | Seoul | da |
| German | Seoul | de |
| diq | Seul | diq |
| dsb | Soul | dsb |
| dtp | Seoul | dtp |
| dty | सियोल | dty |
| Modern Greek (1453-) | Σεούλ | el |
| English | Seoul | en |
| en-ca | Seoul | en-ca |
| en-gb | Seoul | en-gb |
| en-us | Seoul | en-us |
| Esperanto | Seulo | eo |
| Spanish | Seúl | es |
| Estonian | Soul | et |
| Basque | Seul | eu |
| ext | Seúl | ext |
| Persian | سئول | fa |
| Finnish | Soul | fi |
| Faroese | Seoul | fo |
| French | Séoul | fr |
| frr | Seoul | frr |
| fur | Seûl | fur |
| Western Frisian | Seoul | fy |
| Irish | Súl | ga |
| gag | Seul | gag |
| gan | 首爾 | gan |
| Scottish Gaelic | Seoul | gd |
| Galician | Seúl | gl |
| Guaraní | Seúl | gn |
| gpe | Seoul | gpe |
| grc | Σεούλη | grc |
| gsw | Seoul | gsw |
| Gujarati | સિઓલ | gu |
| Hausa | Seoul | ha |
| hak | Sú-ngì | hak |
| haw | Seoul | haw |
| Hebrew | סיאול | he |
| Hindi | सियोल | hi |
| hif | Seoul | hif |
| Croatian | Seul | hr |
| Upper Sorbian | Seoul | hsb |
| Haitian | Seoul | ht |
| Hungarian | Szöul | hu |
| Armenian | Սեուլ | hy |
| Interlingua (International Auxiliary Language Association) | Seoul | ia |
| iba | Seoul | iba |
| Indonesian | Seoul | id |
| Interlingue | Seoul | ie |
| igl | Séoul | igl |
| Inupiaq | Suulaq | ik |
| ilo | Seoul | ilo |
| inh | Сеул | inh |
| Ido | Seoul | io |
| Icelandic | Seúl | is |
| Italian | Seul | it |
| Japanese | ソウル特別市 | ja |
| jam | Siol | jam |
| Javanese | Seoul | jv |
| Georgian | სეული | ka |
| kaa | Seul | kaa |
| kab | Seyul | kab |
| kbp | Sewuuli | kbp |
| kcg | Sa̱ul | kcg |
| Kongo | Seoul | kg |
| kge | Seoul | kge |
| Kazakh | Сеул | kk |
| kk-cyrl | Сеул | kk-cyrl |
| Kalaallisut | Seoul | kl |
| Khmer | សេអ៊ូល | km |
| Kannada | ಸೌಲ್ | kn |
| Korean | 서울특별시 | ko |
| Kashmiri | سیول | ks |
| Kurdish | Sêûl | ku |
| Cornish | Seoul | kw |
| Kirghiz | Сеул | ky |
| Latin | Seulum | la |
| lad | Seul | lad |
| Luxembourgish | Seoul | lb |
| lez | Сеул | lez |
| lfn | Seoul | lfn |
| Limburgan | Seoel | li |
| lij | Seoul | lij |
| lmo | Seoul | lmo |
| Lingala | Sɔul | ln |
| Lao | ໂຊລ | lo |
| lrc | سئول | lrc |
| Lithuanian | Seulas | lt |
| Latvian | Seula | lv |
| lzh | 首爾 | lzh |
| mdf | Сэул | mdf |
| Malagasy | Seoul | mg |
| mhr | Сеул | mhr |
| Maori | Houra | mi |
| min | Seoul | min |
| Macedonian | Сеул | mk |
| Malayalam | സോൾ | ml |
| Mongolian | Сөүл | mn |
| mo | Сеул | mo |
| Marathi | सोल | mr |
| Malay (macrolanguage) | Seoul | ms |
| Maltese | Seoul | mt |
| mwl | Seul | mwl |
| Burmese | ဆိုးလ်မြို့ | my |
| myv | Сеул ош | myv |
| mzn | سئول | mzn |
| Nauru | Seoul | na |
| nah | Seul | nah |
| nan | Seoul Te̍k-pia̍t-chhī | nan |
| Norwegian Bokmål | Seoul | nb |
| Low German | Seoul | nds |
| Nepali (macrolanguage) | सोल | ne |
| new | सोल | new |
| Dutch | Seoel | nl |
| Norwegian Nynorsk | Seoul | nn |
| nov | Seoul | nov |
| Chichewa | Seoul | ny |
| Occitan (post 1500) | Seol | oc |
| Livvi | Seul | olo |
| Oriya (macrolanguage) | ସିଓଲ | or |
| Ossetian | Сеул | os |
| Panjabi | ਸਿਓਲ | pa |
| Pampanga | Seoul | pam |
| pap | Seoul | pap |
| pcd | Séoul | pcd |
| pih | Soel | pih |
| Polish | Seul | pl |
| pms | Seoul | pms |
| pnb | سیول | pnb |
| Pushto | سيول | ps |
| Portuguese | Seul | pt |
| pt-br | Seul | pt-br |
| Quechua | Siul | qu |
| Romansh | Seoul | rm |
| rmy | Seoul | rmy |
| Romanian | Seul | ro |
| roa-tara | Seul | roa-tara |
| Russian | Сеул | ru |
| rue | Соул | rue |
| rup | Seoul | rup |
| sah | Сеул | sah |
| sat | ᱥᱤᱣᱩᱞ | sat |
| Sardinian | Seùl | sc |
| Sicilian | Seoul | scn |
| Scots | Seoul | sco |
| Sindhi | سيئول | sd |
| sgs | Seuls | sgs |
| sh | Seoul | sh |
| shi | Syul | shi |
| Sinhala | සෝල් | si |
| Slovak | Soul | sk |
| Slovenian | Seul | sl |
| Shona | Seoul | sn |
| Somali | Seoul | so |
| Albanian | Seoul | sq |
| Serbian | Сеул | sr |
| Sundanese | Seoul | su |
| Swedish | Seoul | sv |
| Swahili (macrolanguage) | Seoul | sw |
| szl | Seul | szl |
| Tamil | சியோல் | ta |
| Telugu | సియొల్ | te |
| Tajik | Сеул | tg |
| tg-cyrl | Сеул | tg-cyrl |
| Thai | โซล | th |
| Turkmen | Seul | tk |
| Tagalog | Seoul | tl |
| tly | Seul | tly |
| tok | ma tomo Solu | tok |
| Tok Pisin | Sol | tpi |
| Turkish | Seul | tr |
| Tatar | Сеул | tt |
| udm | Сеул | udm |
| Ukrainian | Сеул | uk |
| Urdu | سؤل | ur |
| Uzbek | Seul | uz |
| vec | Seul | vec |
| vep | Seul | vep |
| Vietnamese | Seoul | vi |
| vls | Seoel | vls |
| Volapük | Söul | vo |
| vro | Sŏul | vro |
| war | Seoul | war |
| Wu Chinese | 首尔 | wuu |
| xmf | სეული | xmf |
| Yiddish | סעאל | yi |
| Yoruba | Seoul | yo |
| yue | 首爾 | yue |
| Zhuang | Soujwj | za |
| zgh | ⵙⵢⵓⵍ | zgh |
| Chinese | 首爾 | zh |
| zh-cn | 首尔 | zh-cn |
| zh-hans | 首尔 | zh-hans |
| zh-hant | 首爾 | zh-hant |
| zh-hk | 首爾 | zh-hk |
| zh-mo | 首爾 | zh-mo |
| zh-my | 首尔 | zh-my |
| zh-sg | 首尔 | zh-sg |
| zh-tw | 首爾 | zh-tw |