Mozilla Messaging provides Thunderbird Beta for Windows, Linux, and Mac OS X in English only for Alpha releases. Beta and release versions will be made available in more languages.
| Language | Version | Windows | Mac OS X | Linux | |
|---|---|---|---|---|---|
| Albanian | Shqip | 22.0b1 | Download | Download | Download |
| Arabic | عربي | 22.0b1 | Download | Download | Download |
| Armenian | Հայերեն | 22.0b1 | Download | Download | Download |
| Asturian | Asturianu | 22.0b1 | Download | Download | Download |
| Basque | Euskara | 22.0b1 | Download | Download | Download |
| Belarusian | Беларуская | 22.0b1 | Download | Download | Download |
| Bengali (Bangladesh) | বাংলা (বাংলাদেশ) | 22.0b1 | Download | Download | Download |
| Breton | Brezhoneg | 22.0b1 | Download | Download | Download |
| Bulgarian | Български | 22.0b1 | Download | Download | Download |
| Catalan | Català | 22.0b1 | Download | Download | Download |
| Chinese (Simplified) | 中文 (简体) | 22.0b1 | Download | Download | Download |
| Chinese (Traditional) | 正體中文 (繁體) | 22.0b1 | Download | Download | Download |
| Croatian | Hrvatski | 22.0b1 | Download | Download | Download |
| Czech | Čeština | 22.0b1 | Download | Download | Download |
| Danish | Dansk | 22.0b1 | Download | Download | Download |
| Dutch | Nederlands | 22.0b1 | Download | Download | Download |
| English (British) | English (British) | 22.0b1 | Download | Download | Download |
| English (US) | English (US) | 22.0b1 | Download | Download | Download |
| Estonian | Eesti keel | 22.0b1 | Download | Download | Download |
| Finnish | suomi | 22.0b1 | Download | Download | Download |
| French | Français | 22.0b1 | Download | Download | Download |
| Frisian | Frysk | 22.0b1 | Download | Download | Download |
| Gaelic (Scotland) | Gàidhlig | 22.0b1 | Download | Download | Download |
| Galician | Galego | 22.0b1 | Download | Download | Download |
| German | Deutsch | 22.0b1 | Download | Download | Download |
| Greek | Ελληνικά | 22.0b1 | Download | Download | Download |
| Hebrew | עברית | 22.0b1 | Download | Download | Download |
| Hungarian | magyar | 22.0b1 | Download | Download | Download |
| Icelandic | íslenska | 22.0b1 | Download | Download | Download |
| Indonesian | Bahasa Indonesia | 22.0b1 | Download | Download | Download |
| Irish | Gaeilge | 22.0b1 | Download | Download | Download |
| Italian | Italiano | 22.0b1 | Download | Download | Download |
| Japanese | 日本語 | 22.0b1 | Download | Download | Download |
| Korean | 한국어 | 22.0b1 | Download | Download | Download |
| Lithuanian | lietuvių kalba | 22.0b1 | Download | Download | Download |
| Norwegian (Bokmål) | Norsk bokmål | 22.0b1 | Download | Download | Download |
| Norwegian (Nynorsk) | Norsk nynorsk | 22.0b1 | Download | Download | Download |
| Polish | Polski | 22.0b1 | Download | Download | Download |
| Portuguese (Brazilian) | Português (do Brasil) | 22.0b1 | Download | Download | Download |
| Portuguese (Portugal) | Português (Europeu) | 22.0b1 | Download | Download | Download |
| Punjabi | ਪੰਜਾਬੀ | 22.0b1 | Download | Download | Download |
| Romanian | română | 22.0b1 | Download | Download | Download |
| Romansh | rumantsch | 22.0b1 | Download | Download | Download |
| Russian | Русский | 22.0b1 | Download | Download | Download |
| Serbian | Српски | 22.0b1 | Download | Download | Download |
| Sinhala | සිංහල | 22.0b1 | Download | Download | Download |
| Slovak | slovenčina | 22.0b1 | Download | Download | Download |
| Slovenian | Slovenščina | 22.0b1 | Download | Download | Download |
| Spanish (Argentina) | Español (de Argentina) | 22.0b1 | Download | Download | Download |
| Spanish (Spain) | Español (de España) | 22.0b1 | Download | Download | Download |
| Swedish | Svenska | 22.0b1 | Download | Download | Download |
| Tamil (Sri Lanka) | தமிழ் (இலங்கை) | 22.0b1 | Download | Download | Download |
| Turkish | Türkçe | 22.0b1 | Download | Download | Download |
| Ukrainian | Українська | 22.0b1 | Download | Download | Download |
| Vietnamese | Tiếng Việt | 22.0b1 | Download | Download | Download |