(Note: For Firefox 57 and later versions, It's not possible at all to have a compatible build of this add-on).
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It exposes the hidden preferences that define the preferred language for the user interface of the application. It allows you to change quickly the preferred language among all those available languages, either the one shipped with the application or others provided by language packs.
The screenshots give a general exposition of the tools and options supported by the extension. Note that the provided toolbar button must be added manually from the toolbar palette to be accessible.
If you have arrived to this page searching how to change the interface language once and for all, the recommended procedure is to download and reinstall the entire application (either Firefox, Thunderbird or SeaMonkey) already translated to your language.
Please note that it's not to manage the preferred languages for the content of webpages, or the language for the spell-checker.
Localizations
Available in: عربي (ar), Català (ca), Deutsch (de), Dolnoserbšćina (dsb), Ελληνικά (el), English (en-US), Esperanto (eo), Español (es-ES), Français (fr), Gàidhlig (gd), Hornjoserbsce (hsb), 日本語 (ja), 한국어 (ko), Latviešu (lv), Nederlands (nl), Português (do Brasil, pt-BR), rumantsch (rm), Русский (ru), Српски (sr), Svenska (sv-SE), Українська (uk-UA), 中文 (简体, zh-CN), 正體中文 (繁體, zh-TW).
You can help with the localization to other regions at BabelZilla.
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It exposes the hidden preferences that define the preferred language for the user interface of the application. It allows you to change quickly the preferred language among all those available languages, either the one shipped with the application or others provided by language packs.
The screenshots give a general exposition of the tools and options supported by the extension. Note that the provided toolbar button must be added manually from the toolbar palette to be accessible.
If you have arrived to this page searching how to change the interface language once and for all, the recommended procedure is to download and reinstall the entire application (either Firefox, Thunderbird or SeaMonkey) already translated to your language.
Please note that it's not to manage the preferred languages for the content of webpages, or the language for the spell-checker.
Localizations
Available in: عربي (ar), Català (ca), Deutsch (de), Dolnoserbšćina (dsb), Ελληνικά (el), English (en-US), Esperanto (eo), Español (es-ES), Français (fr), Gàidhlig (gd), Hornjoserbsce (hsb), 日本語 (ja), 한국어 (ko), Latviešu (lv), Nederlands (nl), Português (do Brasil, pt-BR), rumantsch (rm), Русский (ru), Српски (sr), Svenska (sv-SE), Українська (uk-UA), 中文 (简体, zh-CN), 正體中文 (繁體, zh-TW).
You can help with the localization to other regions at BabelZilla.