Useful Links:
| CLDR | Mozilla | ||||
|---|---|---|---|---|---|
| Locale | Available | Name | Text Transformation | Transformed name | Name |
| ach | No | --- | --- | --- | Acholi |
| af | Yes | Afrikaans | --- | Afrikaans | Afrikaans |
| an | Yes | aragonés | --- | Aragonés | Aragonés |
| ar | Yes | العربية | --- | العربية | العربية |
| ast | Yes | asturianu | --- | Asturianu | Asturianu |
| az | Yes | azərbaycan | --- | Azərbaycan | Azərbaycanca |
| be | Yes | беларуская | --- | Беларуская | Беларуская |
| bg | Yes | български | --- | Български | Български |
| bn | Yes | বাংলা | --- | বাংলা | বাংলা |
| bo | Yes | བོད་སྐད་ | --- | བོད་སྐད་ | --- |
| br | Yes | brezhoneg | --- | Brezhoneg | Brezhoneg |
| brx | Yes | बर’ | --- | बर’ | --- |
| bs | Yes | bosanski | --- | Bosanski | Bosanski |
| ca | Yes | català | --- | Català | Català |
| ca-valencia | No | --- | --- | --- | --- |
| cak | No | --- | --- | --- | Kaqchikel |
| ckb | Yes | کوردیی ناوەندی | --- | کوردیی ناوەندی | --- |
| cs | Yes | čeština | titlecase-firstword | Čeština | Čeština |
| cy | Yes | Cymraeg | --- | Cymraeg | Cymraeg |
| da | Yes | dansk | titlecase-firstword | Dansk | Dansk |
| de | Yes | Deutsch | --- | Deutsch | Deutsch |
| dsb | Yes | dolnoserbšćina | --- | Dolnoserbšćina | Dolnoserbšćina |
| el | Yes | Ελληνικά | --- | Ελληνικά | Ελληνικά |
| en-CA | Yes | Canadian English | --- | Canadian English | English |
| en-GB | Yes | British English | --- | British English | English |
| en-US | Yes | English | --- | English | English |
| eo | Yes | esperanto | --- | Esperanto | Esperanto |
| es-AR | Yes | --- | titlecase-firstword | --- | Español |
| es-CL | Yes | --- | titlecase-firstword | --- | Español |
| es-ES | Yes | español | titlecase-firstword | Español | Español |
| es-MX | Yes | español de México | titlecase-firstword | Español De México | Español |
| et | Yes | eesti | --- | Eesti | Eesti |
| eu | Yes | euskara | --- | Euskara | Euskara |
| fa | Yes | فارسی | --- | فارسی | فارسی |
| ff | Yes | Pulaar | --- | Pulaar | Fulfulde |
| fi | Yes | suomi | titlecase-firstword | Suomi | suomi |
| fr | Yes | français | titlecase-firstword | Français | Français |
| fur | Yes | furlan | --- | Furlan | Furlan |
| fy-NL | Yes | Frysk | --- | Frysk | Frysk |
| ga-IE | Yes | Gaeilge | --- | Gaeilge | Gaeilge |
| gd | Yes | Gàidhlig | --- | Gàidhlig | Gàidhlig |
| gl | Yes | galego | --- | Galego | Galego |
| gn | Yes | avañe’ẽ | --- | Avañe’Ẽ | Guarani |
| gu-IN | Yes | ગુજરાતી | --- | ગુજરાતી | ગુજરાતી |
| he | Yes | עברית | --- | עברית | עברית |
| hi-IN | Yes | हिन्दी | --- | हिन्दी | हिन्दी |
| hr | Yes | hrvatski | titlecase-firstword | Hrvatski | Hrvatski |
| hsb | Yes | hornjoserbšćina | --- | Hornjoserbšćina | Hornjoserbšćina |
| hu | Yes | magyar | --- | Magyar | magyar |
| hy-AM | Yes | հայերեն | --- | Հայերեն | Հայերեն |
| hye | No | --- | --- | --- | --- |
| ia | Yes | interlingua | --- | Interlingua | Interlingua |
| id | Yes | Indonesia | --- | Indonesia | Indonesia |
| is | Yes | íslenska | --- | Íslenska | Íslenska |
| it | Yes | italiano | titlecase-firstword | Italiano | Italiano |
| ja | Yes | 日本語 | --- | 日本語 | 日本語 |
| ja-JP-mac | Yes | 日本語 | --- | 日本語 | 日本語 |
| ka | Yes | ქართული | --- | ქართული | ქართული |
| kab | Yes | Taqbaylit | --- | Taqbaylit | Taqbaylit |
| kk | Yes | қазақ тілі | --- | Қазақ Тілі | Қазақ |
| km | Yes | ខ្មែរ | --- | ខ្មែរ | ខ្មែរ |
| kn | Yes | ಕನ್ನಡ | --- | ಕನ್ನಡ | ಕನ್ನಡ |
| ko | Yes | 한국어 | --- | 한국어 | 한국어 |
| lij | Yes | ligure | --- | Ligure | Ligure |
| lo | Yes | ລາວ | --- | ລາວ | ພາສາລາວ |
| lt | Yes | lietuvių | --- | Lietuvių | Lietuvių |
| ltg | No | --- | --- | --- | Latgalīšu |
| lv | Yes | latviešu | --- | Latviešu | Latviešu |
| meh | No | --- | --- | --- | Mixteco tlaxiaco del sureste |
| mix | No | --- | --- | --- | --- |
| mk | Yes | македонски | --- | Македонски | Македонски |
| ml | Yes | മലയാളം | --- | മലയാളം | --- |
| mr | Yes | मराठी | --- | मराठी | मराठी |
| ms | Yes | Melayu | --- | Melayu | Melayu |
| my | Yes | မြန်မာ | --- | မြန်မာ | မြန်မာ |
| nb-NO | Yes | norsk bokmål | --- | Norsk Bokmål | Norsk (bokmål) |
| ne-NP | Yes | नेपाली | --- | नेपाली | बेलारुसीयन |
| nl | Yes | Nederlands | --- | Nederlands | Nederlands |
| nn-NO | Yes | norsk nynorsk | --- | Norsk Nynorsk | Norsk (nynorsk) |
| oc | Yes | --- | --- | --- | Occitan |
| pa-IN | Yes | ਪੰਜਾਬੀ | --- | ਪੰਜਾਬੀ | ਪੰਜਾਬੀ |
| pl | Yes | polski | --- | Polski | Polski |
| pt-BR | Yes | português | titlecase-firstword | Português | Português |
| pt-PT | Yes | português europeu | no-change | português europeu | Português |
| rm | Yes | rumantsch | --- | Rumantsch | Rumantsch |
| ro | Yes | română | --- | Română | Română |
| ru | Yes | русский | titlecase-firstword | Русский | Русский |
| sat | Yes | ᱥᱟᱱᱛᱟᱲᱤ | --- | ᱥᱟᱱᱛᱟᱲᱤ | --- |
| sc | Yes | sardu | --- | Sardu | Sardu |
| scn | Yes | sicilianu | --- | Sicilianu | --- |
| sco | No | --- | --- | --- | Scots |
| si | Yes | සිංහල | --- | සිංහල | සිංහල |
| sk | Yes | slovenčina | titlecase-firstword | Slovenčina | Slovenčina |
| skr | No | --- | --- | --- | --- |
| sl | Yes | slovenščina | --- | Slovenščina | slovenščina |
| son | No | --- | --- | --- | Soŋay |
| sq | Yes | shqip | --- | Shqip | Shqip |
| sr | Yes | српски | --- | Српски | српски |
| sv-SE | Yes | svenska | titlecase-firstword | Svenska | Svenska |
| szl | Yes | ślōnski | --- | Ślōnski | Ślōnsko |
| ta | Yes | தமிழ் | --- | தமிழ் | தமிழ் |
| te | Yes | తెలుగు | --- | తెలుగు | తెలుగు |
| tg | Yes | тоҷикӣ | --- | Тоҷикӣ | Тоҷикӣ |
| th | Yes | ไทย | --- | ไทย | ไทย |
| tl | No | --- | --- | --- | Tagalog |
| tr | Yes | Türkçe | --- | Türkçe | Türkçe |
| trs | No | --- | --- | --- | Nânj nï’ïn |
| uk | Yes | українська | titlecase-firstword | Українська | Українська |
| ur | Yes | اردو | --- | اردو | اردو |
| uz | Yes | o‘zbek | --- | O‘Zbek | Oʻzbekcha |
| vi | Yes | Tiếng Việt | --- | Tiếng Việt | Việt |
| wo | Yes | Wolof | --- | Wolof | Wolof |
| xh | Yes | IsiXhosa | --- | Isixhosa | IsiXhosa |
| zam | No | --- | --- | --- | --- |
| zh-CN | Yes | 简体中文 | --- | 简体中文 | 中文 |
| zh-TW | Yes | 繁體中文 | --- | 繁體中文 | 中文 |