| Language | Name | Code |
|---|---|---|
| Afrikaans | Oslo | af |
| Amharic | ኦስሎ | am |
| Aragonese | Oslo | an |
| ang | Oslo | ang |
| Arabic | أوسلو | ar |
| Official Aramaic (700-300 BCE) | ܐܘܣܠܘ | arc |
| ary | ؤصلو | ary |
| arz | اوسلو | arz |
| Asturian | Oslu | ast |
| Avaric | Осло | av |
| avk | Oslo | avk |
| Aymara | Oslo | ay |
| Azerbaijani | Oslo | az |
| Bashkir | Осло | ba |
| ban | Oslo | ban |
| Bavarian | Oslo | bar |
| bcl | Oslo | bcl |
| Belarusian | Осла | be |
| be-tarask | Осьлё | be-tarask |
| bew | Oslo | bew |
| Bulgarian | Осло | bg |
| bho | ओस्लो | bho |
| Bengali | অসলো | bn |
| Tibetan | ཨོ་སི་ལོ། | bo |
| bpy | ওসলো | bpy |
| Breton | Oslo | br |
| Bosnian | Oslo | bs |
| bxr | Осло | bxr |
| Catalan | Oslo | ca |
| cdo | Ó̤-sṳ̆-lṳ̆k | cdo |
| Chechen | Осло | ce |
| Cebuano | Oslo | ceb |
| Central Kurdish | ئۆسلۆ | ckb |
| Corsican | Oslu | co |
| crh | Oslo | crh |
| crh-latn | Oslo | crh-latn |
| Czech | Oslo | cs |
| csb | Oslo | csb |
| Church Slavic | Осло | cu |
| Chuvash | Осло | cv |
| Welsh | Oslo | cy |
| Danish | Oslo | da |
| German | Oslo | de |
| de-at | Oslo | de-at |
| de-ch | Oslo | de-ch |
| diq | Oslo | diq |
| dsb | Oslo | dsb |
| Ewe | Oslo | ee |
| Modern Greek (1453-) | Όσλο | el |
| eml | Òślo | eml |
| English | Oslo | en |
| en-ca | Oslo | en-ca |
| en-gb | Oslo | en-gb |
| Esperanto | Oslo | eo |
| Spanish | Oslo | es |
| Estonian | Oslo | et |
| Basque | Oslo | eu |
| ext | Oslu | ext |
| Persian | اسلو | fa |
| Finnish | Oslo | fi |
| Faroese | Oslo | fo |
| French | Oslo | fr |
| frp | Oslo | frp |
| frr | Oslo | frr |
| fur | Oslo | fur |
| Western Frisian | Oslo | fy |
| Irish | Osló | ga |
| gag | Oslo | gag |
| Scottish Gaelic | Oslo | gd |
| Galician | Oslo | gl |
| got | 𐌰𐌿𐍃𐌻𐍉 | got |
| gsw | Oslo | gsw |
| Gujarati | ઓસ્લો | gu |
| Manx | Oslo | gv |
| Hausa | Oslo | ha |
| hak | Oslo | hak |
| haw | Oslo | haw |
| Hebrew | אוסלו | he |
| Hindi | ओस्लो | hi |
| hif | Oslo | hif |
| Croatian | Oslo | hr |
| Upper Sorbian | Oslo | hsb |
| Haitian | Oslo | ht |
| Hungarian | Oslo | hu |
| Armenian | Օսլո | hy |
| Interlingua (International Auxiliary Language Association) | Oslo | ia |
| Indonesian | Oslo | id |
| Interlingue | Oslo | ie |
| Ido | Oslo | io |
| Icelandic | Ósló | is |
| Italian | Oslo | it |
| Japanese | オスロ | ja |
| Javanese | Oslo | jv |
| Georgian | ოსლო | ka |
| kaa | Oslo | kaa |
| kab | Oslo | kab |
| kbp | Ɔsɩloo | kbp |
| kge | Oslo | kge |
| Kazakh | Осло | kk |
| kk-cyrl | Осло | kk-cyrl |
| Kalaallisut | Oslo | kl |
| Kannada | ಓಸ್ಲೋ | kn |
| Korean | 오슬로 | ko |
| Kurdish | Oslo | ku |
| Komi | Осло | kv |
| Cornish | Oslo | kw |
| Kirghiz | Осло | ky |
| Latin | Asloa | la |
| lad | Oslo | lad |
| Luxembourgish | Oslo | lb |
| lbe | Осло | lbe |
| lez | Осло | lez |
| lfn | Oslo | lfn |
| Limburgan | Oslo | li |
| lij | Oslo | lij |
| lmo | Oslo | lmo |
| Lingala | Oslo | ln |
| lrc | اسلو | lrc |
| Lithuanian | Oslas | lt |
| Latvian | Oslo | lv |
| mdf | Осло | mdf |
| Malagasy | Oslo | mg |
| Maori | Ōhoro | mi |
| Macedonian | Осло | mk |
| Malayalam | ഓസ്ലൊ | ml |
| Mongolian | Осло | mn |
| Marathi | ओस्लो | mr |
| mrj | Осло | mrj |
| Malay (macrolanguage) | Oslo | ms |
| ms-arab | اوسلو | ms-arab |
| Maltese | Oslo | mt |
| mul | Oslo | mul |
| Burmese | အော့စလိုမြို့ | my |
| myv | Осло ош | myv |
| mzn | اسلو | mzn |
| Nauru | Oslo | na |
| nah | Oslo | nah |
| nan | Oslo | nan |
| Norwegian Bokmål | Oslo | nb |
| Low German | Oslo | nds |
| nds-nl | Oslo | nds-nl |
| Nepali (macrolanguage) | ओस्लो | ne |
| Dutch | Oslo | nl |
| Norwegian Nynorsk | Oslo | nn |
| nov | Oslo | nov |
| Navajo | Tsį́į́haltsooí | nv |
| Occitan (post 1500) | Òslo | oc |
| Livvi | Oslo | olo |
| Oriya (macrolanguage) | ଅସଲୋ | or |
| Ossetian | Осло | os |
| Panjabi | ਓਸਲੋ | pa |
| pap | Oslo | pap |
| pcd | Oslo | pcd |
| pdc | Oslo | pdc |
| pih | Oslo | pih |
| Polish | Oslo | pl |
| pms | Òslo | pms |
| pnb | اوسلو | pnb |
| Pushto | اوسلو | ps |
| Portuguese | Oslo | pt |
| pt-br | Oslo | pt-br |
| Quechua | Oslo | qu |
| Romansh | Oslo | rm |
| rmy | Oslo | rmy |
| Romanian | Oslo | ro |
| Russian | Осло | ru |
| rue | Осло | rue |
| rup | Oslo | rup |
| sah | Осло | sah |
| sat | ᱳᱥᱞᱳ | sat |
| Sardinian | Oslo | sc |
| Sicilian | Oslu | scn |
| Scots | Oslo | sco |
| Sindhi | اوسلو | sd |
| Northern Sami | Oslo | se |
| sgs | Uoslos | sgs |
| sh | Oslo | sh |
| Sinhala | ඔස්ලෝ | si |
| Slovak | Oslo | sk |
| Slovenian | Oslo | sl |
| sma | Oslove | sma |
| smj | Oslo | smj |
| smn | Oslo | smn |
| sms | Oslo | sms |
| Shona | Oslo | sn |
| Somali | Oslo | so |
| Albanian | Oslo | sq |
| Serbian | Осло | sr |
| sr-ec | Осло | sr-ec |
| Swedish | Oslo | sv |
| Swahili (macrolanguage) | Oslo | sw |
| szl | Oslo | szl |
| szy | Aw-s-lu | szy |
| Tamil | ஒஸ்லோ | ta |
| Telugu | ఓస్లో | te |
| Tajik | Осло | tg |
| tg-cyrl | Осло | tg-cyrl |
| Thai | ออสโล | th |
| Turkmen | Oslo | tk |
| Tagalog | Oslo | tl |
| tok | ma tomo Usilu | tok |
| Tok Pisin | Oslo | tpi |
| Turkish | Oslo | tr |
| Tsonga | Oslo | ts |
| Tatar | Осло | tt |
| tum | Oslo | tum |
| Twi | Oslo | tw |
| Tahitian | Oslo | ty |
| udm | Осло | udm |
| Uighur | ئوسلو | ug |
| Ukrainian | Осло | uk |
| Urdu | اوسلو | ur |
| Uzbek | Oslo | uz |
| vec | Oslo | vec |
| vep | Oslo | vep |
| Vietnamese | Oslo | vi |
| vls | Oslo | vls |
| Volapük | Oslo | vo |
| vro | Oslo | vro |
| war | Oslo | war |
| Wolof | Oslo | wo |
| Wu Chinese | 奥斯陆 | wuu |
| xmf | ოსლო | xmf |
| Yiddish | אסלא | yi |
| Yoruba | Oslo | yo |
| yue | 奧斯陸 | yue |
| zea | Oslo | zea |
| Chinese | 奥斯陆 | zh |
| zh-cn | 奥斯陆 | zh-cn |
| zh-hans | 奥斯陆 | zh-hans |
| zh-hant | 奧斯陸 | zh-hant |
| zh-hk | 奧斯陸 | zh-hk |
| zh-tw | 奧斯陸 | zh-tw |