| Language | Name | Code |
|---|---|---|
| ace | Tehran | ace |
| ady | Тегеран | ady |
| Afrikaans | Teheran | af |
| Amharic | ቴህራን | am |
| Aragonese | Teherán | an |
| ang | Tehran | ang |
| anp | तेहरान | anp |
| Arabic | طهران | ar |
| Official Aramaic (700-300 BCE) | ܛܗܪܐܢ | arc |
| ary | طهران | ary |
| arz | طهران | arz |
| Assamese | তেহৰাণ | as |
| Asturian | Teḥrán | ast |
| Avaric | Тегьран | av |
| awa | तेहरान | awa |
| Azerbaijani | Tehran | az |
| azb | تئهران | azb |
| Bashkir | Тәһран | ba |
| ban | Téhéran | ban |
| Bavarian | Teheran | bar |
| bcl | Tehran | bcl |
| Belarusian | Тэгеран | be |
| be-tarask | Тэгеран | be-tarask |
| Bulgarian | Техеран | bg |
| Bengali | তেহরান | bn |
| Tibetan | ཏེ་ཧི་རན། | bo |
| Breton | Tehran | br |
| brh | Taerán | brh |
| Bosnian | Teheran | bs |
| bxr | Тегеран | bxr |
| Catalan | Teheran | ca |
| cdo | Tehran | cdo |
| Chechen | Тегеран | ce |
| Cebuano | Dakbayan sa Teheran | ceb |
| Central Kurdish | تاران | ckb |
| crh | Tehran | crh |
| crh-latn | Tehran | crh-latn |
| Czech | Teherán | cs |
| Chuvash | Тегеран | cv |
| Welsh | Tehran | cy |
| Danish | Teheran | da |
| German | Teheran | de |
| de-ch | Teheran | de-ch |
| diq | Tehran | diq |
| dty | तेहरान | dty |
| Modern Greek (1453-) | Τεχεράνη | el |
| English | Tehran | en |
| en-ca | Tehran | en-ca |
| en-gb | Tehran | en-gb |
| Esperanto | Teherano | eo |
| Spanish | Teherán | es |
| Estonian | Teheran | et |
| Basque | Teheran | eu |
| ext | Teherán | ext |
| Persian | تهران | fa |
| Finnish | Teheran | fi |
| Faroese | Teheran | fo |
| French | Téhéran | fr |
| frr | Teheraan | frr |
| Western Frisian | Teheran | fy |
| Irish | Tehran | ga |
| gag | Tahran | gag |
| Scottish Gaelic | Tehran | gd |
| Galician | Teherán | gl |
| glk | تئران | glk |
| Guaraní | Teerã | gn |
| gsw | Teheran | gsw |
| Gujarati | તેહરાન | gu |
| Hausa | Tehran | ha |
| hak | Tehran | hak |
| Hebrew | טהראן | he |
| Hindi | तेहरान | hi |
| hif | Tehran | hif |
| Croatian | Teheran | hr |
| Upper Sorbian | Teheran | hsb |
| Haitian | Teheran | ht |
| Hungarian | Teherán | hu |
| Armenian | Թեհրան | hy |
| hyw | Թեհրան | hyw |
| Interlingua (International Auxiliary Language Association) | Tehran | ia |
| Indonesian | Teheran | id |
| Interlingue | Teheran | ie |
| ilo | Tehran | ilo |
| inh | Тегеран | inh |
| Ido | Tehran | io |
| Icelandic | Teheran | is |
| Italian | Teheran | it |
| Japanese | テヘラン | ja |
| Javanese | Teheran | jv |
| Georgian | თეირანი | ka |
| kaa | Tehran | kaa |
| kab | Ṭehran | kab |
| kbd | Дыхьэрэн | kbd |
| kbp | Teeraŋ | kbp |
| Kongo | Teheran | kg |
| kge | Teheran | kge |
| Kazakh | Тегеран | kk |
| kk-cyrl | Тегеран | kk-cyrl |
| Kalaallisut | Tehran | kl |
| Kannada | ತೆಹ್ರಾನ್ | kn |
| Korean | 테헤란 | ko |
| Kashmiri | تہران | ks |
| Kurdish | Tehran | ku |
| ku-latn | Tehran | ku-latn |
| Cornish | Tehran | kw |
| Kirghiz | Тегеран | ky |
| Latin | Teheranum | la |
| Luxembourgish | Teheran | lb |
| lez | Тегьран | lez |
| lfn | Teran | lfn |
| Limburgan | Teheran | li |
| lij | Teheran | lij |
| lld | Teheran | lld |
| lmo | Teheran | lmo |
| lrc | تیرو | lrc |
| Lithuanian | Teheranas | lt |
| Latvian | Teherāna | lv |
| lzh | 德黑蘭 | lzh |
| mdf | Тэгэран | mdf |
| Malagasy | Teheran | mg |
| mhr | Тегеран | mhr |
| Maori | Tehran | mi |
| min | Tehran | min |
| Macedonian | Техеран | mk |
| Malayalam | ടെഹ്റാൻ | ml |
| Mongolian | Тегеран | mn |
| Marathi | तेहरान | mr |
| Malay (macrolanguage) | Tehran | ms |
| Maltese | Tehran | mt |
| Burmese | တီဟီရန်မြို့ | my |
| myv | Тегеран ош | myv |
| mzn | تهرون | mzn |
| nah | Tehrān | nah |
| nan | Tehran | nan |
| nap | Teheran | nap |
| Norwegian Bokmål | Teheran | nb |
| Low German | Teheran | nds |
| Nepali (macrolanguage) | तेहरान | ne |
| new | तेहरान | new |
| Dutch | Teheran | nl |
| Norwegian Nynorsk | Teheran | nn |
| nov | Teran | nov |
| Navajo | Dziłtsį́į́kʼeh | nv |
| Chichewa | Tehran | ny |
| Occitan (post 1500) | Teheran | oc |
| Livvi | Tegeran | olo |
| Oriya (macrolanguage) | ତେହେରାନ | or |
| Ossetian | Тæхран | os |
| Panjabi | ਤਹਿਰਾਨ | pa |
| pap | Teheran | pap |
| pih | Tegeraan | pih |
| Polish | Teheran | pl |
| pms | Teheran | pms |
| pnb | تہران | pnb |
| Pushto | تهران | ps |
| Portuguese | Teerão | pt |
| pt-br | Teerã | pt-br |
| Quechua | Tehran | qu |
| Romansh | Teheran | rm |
| rmy | Tehran | rmy |
| Romanian | Teheran | ro |
| roa-tara | Teheran | roa-tara |
| Russian | Тегеран | ru |
| rue | Тегеран | rue |
| sah | Тегеран | sah |
| sat | ᱛᱮᱦᱨᱟᱱ | sat |
| Sardinian | Teheran | sc |
| Sicilian | Teheran | scn |
| Scots | Tehran | sco |
| Sindhi | تهران | sd |
| Northern Sami | Teheran | se |
| sgs | Teherans | sgs |
| sh | Teheran | sh |
| Sinhala | ටෙහ්රාන් | si |
| Slovak | Teherán | sk |
| Slovenian | Teheran | sl |
| smn | Teheran | smn |
| Shona | Tehran | sn |
| Somali | Tahraan | so |
| Albanian | Teherani | sq |
| Serbian | Техеран | sr |
| sr-ec | Техеран | sr-ec |
| Swedish | Teheran | sv |
| Swahili (macrolanguage) | Tehran | sw |
| szl | Teheran | szl |
| Tamil | தெஹ்ரான் | ta |
| Telugu | టెహరాన్ | te |
| Tajik | Теҳрон | tg |
| tg-cyrl | Теҳрон | tg-cyrl |
| Thai | เตหะราน | th |
| Turkmen | Tähran | tk |
| Tagalog | Tehrān | tl |
| tly | Tehron | tly |
| Turkish | Tahran | tr |
| Tatar | Тәһран | tt |
| Twi | Teheran | tw |
| udm | Тегеран | udm |
| Uighur | تېھران | ug |
| Ukrainian | Тегеран | uk |
| Urdu | تہران | ur |
| Uzbek | Tehron | uz |
| vec | Tehran | vec |
| vep | Tehran | vep |
| Vietnamese | Tehran | vi |
| Volapük | Tehran | vo |
| vro | Teheran | vro |
| war | Tehran | war |
| Wolof | Tehran | wo |
| Wu Chinese | 德黑兰 | wuu |
| xmf | თეირანი | xmf |
| Yiddish | טעהראן | yi |
| Yoruba | Tehran | yo |
| yue | 德黑蘭 | yue |
| zea | Teheran | zea |
| Chinese | 德黑兰 | zh |
| zh-cn | 德黑兰 | zh-cn |
| zh-hans | 德黑兰 | zh-hans |
| zh-hant | 德黑蘭 | zh-hant |
| zh-hk | 德黑蘭 | zh-hk |
| zh-mo | 德黑蘭 | zh-mo |
| zh-my | 德黑兰 | zh-my |
| zh-sg | 德黑兰 | zh-sg |
| zh-tw | 德黑蘭 | zh-tw |