| Language | Name | Code |
|---|---|---|
| Afrikaans | Leiden | af |
| Amharic | ለይድን | am |
| ang | Leyden | ang |
| Arabic | لايدن | ar |
| arz | لايدين | arz |
| Asturian | Leiden | ast |
| Azerbaijani | Leyden | az |
| ban | Leiden | ban |
| Belarusian | Лейдэн | be |
| be-tarask | Лейдэн | be-tarask |
| Bulgarian | Лайден | bg |
| Bengali | লাইডেন | bn |
| Breton | Leiden | br |
| Catalan | Leiden | ca |
| Chechen | Лейден | ce |
| Cebuano | Leiden | ceb |
| Corsican | Leida | co |
| Czech | Leiden | cs |
| Welsh | Leiden | cy |
| Danish | Leiden | da |
| German | Leiden | de |
| de-ch | Leiden | de-ch |
| Modern Greek (1453-) | Λέιντεν | el |
| English | Leiden | en |
| en-ca | Leiden | en-ca |
| en-gb | Leiden | en-gb |
| Esperanto | Leiden | eo |
| Spanish | Leiden | es |
| Estonian | Leiden | et |
| Basque | Leiden | eu |
| Persian | لیدن | fa |
| Finnish | Leiden | fi |
| Faroese | Leiden | fo |
| French | Leyde | fr |
| frp | Lêda | frp |
| Western Frisian | Leien | fy |
| Irish | Leiden | ga |
| Scottish Gaelic | Leiden | gd |
| Galician | Leiden | gl |
| Gujarati | લીડેન | gu |
| Manx | Leiden | gv |
| Hebrew | ליידן | he |
| Hindi | लेइडेन | hi |
| Croatian | Leiden | hr |
| Hungarian | Leiden | hu |
| Armenian | Լեյդեն | hy |
| hyw | Լէյտըն | hyw |
| Indonesian | Leiden | id |
| Ido | Leiden | io |
| Icelandic | Leiden | is |
| Italian | Leida | it |
| Japanese | ライデン | ja |
| Javanese | Leiden | jv |
| Georgian | ლეიდენი | ka |
| Kannada | ಲೀಡೆನ್ | kn |
| Korean | 레이던 | ko |
| Kurdish | Leiden | ku |
| Cornish | Leiden | kw |
| Latin | Lugdunum Batavorum | la |
| Luxembourgish | Leiden | lb |
| Limburgan | Leiden | li |
| lld | Leiden | lld |
| Lithuanian | Leidenas | lt |
| Latvian | Leidene | lv |
| Macedonian | Лејден | mk |
| Marathi | लेडन | mr |
| Malay (macrolanguage) | Leiden | ms |
| Maltese | Leiden | mt |
| Norwegian Bokmål | Leiden | nb |
| nds-nl | Leidn | nds-nl |
| Dutch | Leiden | nl |
| Norwegian Nynorsk | Leiden | nn |
| Occitan (post 1500) | Lèida | oc |
| Ossetian | Лейден | os |
| pap | Leiden | pap |
| Polish | Lejda | pl |
| pms | Lèida | pms |
| pnb | لیدن | pnb |
| Portuguese | Leida | pt |
| pt-br | Leiden | pt-br |
| Romanian | Leiden | ro |
| Russian | Лейден | ru |
| rue | Лайден | rue |
| Scots | Leiden | sco |
| sh | Leiden | sh |
| Sinhala | ලේයිඩන් | si |
| Slovak | Leiden | sk |
| Slovenian | Leiden | sl |
| Albanian | Lejdeni | sq |
| Serbian | Лајден | sr |
| stq | Leiden | stq |
| Swedish | Leidens kommun | sv |
| Swahili (macrolanguage) | Leiden | sw |
| szl | Leiden | szl |
| Tamil | லைடன் | ta |
| Telugu | లైడెన్ | te |
| Tajik | Лейден | tg |
| Thai | ไลเดิน | th |
| tok | ma tomo Leten | tok |
| Turkish | Leiden | tr |
| Tatar | Лейден | tt |
| Ukrainian | Лейден | uk |
| Urdu | لائڈن | ur |
| Uzbek | Leyden | uz |
| vec | Leida | vec |
| vep | Leiden | vep |
| Vietnamese | Leiden | vi |
| vls | Leydn | vls |
| Volapük | Leiden | vo |
| war | Leiden | war |
| Wu Chinese | 莱顿 | wuu |
| Yiddish | ליידן | yi |
| yue | 萊頓 | yue |
| zea | Leiden | zea |
| Chinese | 莱顿 | zh |
| zh-cn | 莱顿 | zh-cn |
| zh-hans | 莱顿 | zh-hans |
| zh-hant | 萊頓 | zh-hant |