| Language | Name | Code |
|---|---|---|
| Afrikaans | Rennes | af |
| Aragonese | Rennes | an |
| Arabic | رين | ar |
| arz | رين | arz |
| Asturian | Rennes | ast |
| Aymara | Rennes | ay |
| Azerbaijani | Ren | az |
| azb | رن | azb |
| ban | Rennes | ban |
| Bavarian | Rennes | bar |
| Belarusian | Рэн | be |
| be-tarask | Рэн | be-tarask |
| Bulgarian | Рен | bg |
| Bambara | Rennes | bm |
| Bengali | রেন | bn |
| Breton | Roazhon | br |
| Bosnian | Rennes | bs |
| Catalan | Rennes | ca |
| Chechen | ГӀенн | ce |
| Cebuano | Rennes | ceb |
| Central Kurdish | ڕێن | ckb |
| Corsican | Rennes | co |
| Czech | Rennes | cs |
| Chuvash | Ренн | cv |
| Welsh | Roazhon | cy |
| Danish | Rennes | da |
| German | Rennes | de |
| de-at | Rennes | de-at |
| de-ch | Rennes | de-ch |
| diq | Rennes | diq |
| Modern Greek (1453-) | Ρεν | el |
| English | Rennes | en |
| en-ca | Rennes | en-ca |
| en-gb | Rennes | en-gb |
| Esperanto | Renno | eo |
| Spanish | Rennes | es |
| Estonian | Rennes | et |
| Basque | Rennes | eu |
| ext | Rennes | ext |
| Persian | رن | fa |
| Finnish | Rennes | fi |
| Faroese | Rennes | fo |
| French | Rennes | fr |
| frc | Rennes | frc |
| frp | Renes | frp |
| frr | Rennes | frr |
| fur | Rennes | fur |
| Irish | Roazhon | ga |
| Scottish Gaelic | Roazhon | gd |
| Galician | Rennes | gl |
| gsw | Rennes | gsw |
| Gujarati | રેનેસ | gu |
| Manx | Roazhon | gv |
| Hausa | Rennes | ha |
| hak | Rennes | hak |
| Hebrew | רן | he |
| Hindi | रेन्नेस | hi |
| Croatian | Rennes | hr |
| Hungarian | Rennes | hu |
| Armenian | Ռեն | hy |
| Interlingua (International Auxiliary Language Association) | Rennes | ia |
| Indonesian | Rennes | id |
| Interlingue | Rennes | ie |
| Ido | Rennes | io |
| Icelandic | Rennes | is |
| Italian | Rennes | it |
| Japanese | レンヌ | ja |
| jam | Rennes | jam |
| Javanese | Rennes | jv |
| Georgian | რენი | ka |
| kab | Rennes | kab |
| Kongo | Rennes | kg |
| Kazakh | Ренн | kk |
| Kalaallisut | Rennes | kl |
| Kannada | ರೆನ್ನೆಸ್ | kn |
| Korean | 렌 | ko |
| Kurdish | Rennes | ku |
| Cornish | Roazhon | kw |
| Latin | Condate Redonum | la |
| Luxembourgish | Rennes | lb |
| Limburgan | Rennes | li |
| lij | Rennes | lij |
| lld | Rennes | lld |
| Lingala | Rennes | ln |
| Lithuanian | Renas | lt |
| Latvian | Renna | lv |
| mdf | Рэнн | mdf |
| Malagasy | Rennes | mg |
| min | Rennes | min |
| Macedonian | Рен | mk |
| Marathi | ऱ्हेन | mr |
| Malay (macrolanguage) | Rennes | ms |
| Maltese | Rennes | mt |
| mul | Rennes | mul |
| mzn | رن | mzn |
| nan | Rennes | nan |
| nap | Rennes | nap |
| Norwegian Bokmål | Rennes | nb |
| Low German | Rennes | nds |
| nds-nl | Rennes | nds-nl |
| Nepali (macrolanguage) | रेन्नेस | ne |
| Dutch | Rennes | nl |
| Norwegian Nynorsk | Rennes | nn |
| Narom | Rennes | nrm |
| Occitan (post 1500) | Rènnas | oc |
| Ossetian | Ренн | os |
| pap | Rennes | pap |
| pcd | Rennes | pcd |
| Polish | Rennes | pl |
| pms | Rennes | pms |
| pnb | رینے | pnb |
| pnt | Ρεν | pnt |
| prg | Rennes | prg |
| Portuguese | Rennes | pt |
| pt-br | Rennes | pt-br |
| Quechua | Rennes | qu |
| rgn | Rennes | rgn |
| Romansh | Rennes | rm |
| Romanian | Rennes | ro |
| Russian | Рен | ru |
| Sardinian | Rennes | sc |
| Sicilian | Rennes | scn |
| Scots | Rennes | sco |
| sh | Rennes | sh |
| Sinhala | රෙන්නේස් | si |
| Slovak | Rennes | sk |
| Slovenian | Rennes | sl |
| Somali | Rennes | so |
| Albanian | Rennes | sq |
| Serbian | Рен | sr |
| sr-el | Rennes | sr-el |
| Swedish | Rennes | sv |
| Swahili (macrolanguage) | Rennes | sw |
| Tamil | ரேன் | ta |
| Telugu | రెన్నెస్ | te |
| Thai | แรน | th |
| Turkish | Rennes | tr |
| Tatar | Ренн | tt |
| Twi | Rennes | tw |
| Uighur | Rénn Shehiri | ug |
| Ukrainian | Ренн | uk |
| Urdu | رین | ur |
| Uzbek | Rennes | uz |
| vec | Rennes | vec |
| Vietnamese | Rennes | vi |
| vls | Rennes | vls |
| vmf | Rennes | vmf |
| Volapük | Rennes | vo |
| Walloon | Rennes | wa |
| war | Rennes | war |
| Wolof | Rennes | wo |
| Wu Chinese | 雷恩 | wuu |
| yue | 利拿 | yue |
| zea | Rennes | zea |
| Chinese | 雷恩 | zh |
| zh-cn | 雷恩市 | zh-cn |
| zh-hans | 雷恩 | zh-hans |
| zh-hant | 雷恩 | zh-hant |
| zh-hk | 雷恩 | zh-hk |
| zh-tw | 雷恩 | zh-tw |
| Zulu | Rennes | zu |