| Language | Name | Code |
|---|---|---|
| Aragonese | Gniezno | an |
| Arabic | جنازنة | ar |
| arz | جنيزنو | arz |
| Asturian | Gniezno | ast |
| Azerbaijani | Qnezno | az |
| azb | قینیزنا | azb |
| Belarusian | Гнезна | be |
| be-tarask | Гнезна | be-tarask |
| Bulgarian | Гнезно | bg |
| Bosnian | Gniezno | bs |
| Catalan | Gniezno | ca |
| Chechen | Гнезно | ce |
| Cebuano | Gniezno (kapital sa powiat) | ceb |
| Czech | Hnězdno | cs |
| csb | Gniezno | csb |
| Danish | Gniezno | da |
| German | Gniezno | de |
| de-ch | Gniezno | de-ch |
| dsb | Gniezno | dsb |
| Modern Greek (1453-) | Γκνιέζνο | el |
| English | Gniezno | en |
| en-ca | Gniezno | en-ca |
| en-gb | Gniezno | en-gb |
| Esperanto | Gniezno | eo |
| Spanish | Gniezno | es |
| Estonian | Gniezno | et |
| Basque | Gniezno | eu |
| Persian | گینیزنا | fa |
| Finnish | Gniezno | fi |
| Faroese | Gniezno | fo |
| French | Gniezno | fr |
| Irish | Gniezno | ga |
| Galician | Gniezno | gl |
| gsw | Gnesen | gsw |
| Hebrew | גנייזנו | he |
| Croatian | Gniezno | hr |
| Hungarian | Gniezno | hu |
| Armenian | Գնեզնո | hy |
| Interlingua (International Auxiliary Language Association) | Gniezno | ia |
| Indonesian | Gniezno | id |
| Italian | Gniezno | it |
| Japanese | グニェズノ | ja |
| Javanese | Gniezno | jv |
| Georgian | გნეზნო | ka |
| Korean | 그니에즈노 | ko |
| Latin | Gnesna | la |
| lmo | Gniezno | lmo |
| Lithuanian | Gnieznas | lt |
| Latvian | Gņezno | lv |
| Macedonian | Гњезно | mk |
| Malay (macrolanguage) | Gniezno | ms |
| Nauru | Gniezno | na |
| nan | Gniezno | nan |
| nap | Gniezno | nap |
| Norwegian Bokmål | Gniezno | nb |
| Low German | Gnesen | nds |
| Dutch | Gniezno | nl |
| Occitan (post 1500) | Gniezno | oc |
| pih | Gniezno | pih |
| Polish | Gniezno | pl |
| Portuguese | Gniezno | pt |
| pt-br | Gniezno | pt-br |
| Quechua | Gniezno | qu |
| Romanian | Gniezno | ro |
| Russian | Гнезно | ru |
| Scots | Gniezno | sco |
| sh | Gniezno | sh |
| Slovak | Gniezno | sk |
| Slovenian | Gniezno | sl |
| Albanian | Gniezno | sq |
| Serbian | Гњезно | sr |
| Swedish | Gniezno | sv |
| szl | Gńezno | szl |
| Thai | กแญซนอ | th |
| Turkish | Gniezno | tr |
| Tatar | Гнезно | tt |
| Ukrainian | Гнєзно | uk |
| Vietnamese | Gniezno | vi |
| Volapük | Gniezno | vo |
| war | Gniezno | war |
| Wu Chinese | 格涅兹诺 | wuu |
| yue | 格涅茲諾 | yue |
| Chinese | 格涅茲諾 | zh |
| zh-cn | 格涅兹诺 | zh-cn |
| zh-hans | 格涅兹诺 | zh-hans |
| zh-hant | 格涅茲諾 | zh-hant |