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can't change the language of the user interface with "general.useragent.locale" after auto update Nov 18

Posted

I tried https://support.mozilla.org/en-US/kb/use-firefox-interface-other-languages-language-pack

In the address bar, type about:config and press Enter.

In the Search field, type intl.locale.matchOS.

If the intl.locale.matchOS preference has a value of true, double-click it to toggle its value to false.

Clear the Search field, and type general.useragent.locale.

Double-click the general.useragent.locale preference, and enter the code of the language you want to use. This page lists most of the language codes used for Mozilla localizations.

Click the menu button New Fx Menu and then click Exit Close 29 .

Language does not change from en to de

edited by a moderator to get rid of the horizontal scrollbar inside the message - triggered in this forum software by leading line spaces.

I tried https://support.mozilla.org/en-US/kb/use-firefox-interface-other-languages-language-pack In the address bar, type about:config and press Enter. In the Search field, type intl.locale.matchOS. If the intl.locale.matchOS preference has a value of true, double-click it to toggle its value to false. Clear the Search field, and type general.useragent.locale. Double-click the general.useragent.locale preference, and enter the code of the language you want to use. This page lists most of the language codes used for Mozilla localizations. Click the menu button New Fx Menu and then click Exit Close 29 . Language does not change from en to de ''edited by a moderator to get rid of the horizontal scrollbar inside the message - triggered in this forum software by leading line spaces.

Modified by the-edmeister

Chosen solution

Glad it worked in the end {Use Firefox in another language} & thanks for letting us know.

Note if you want only one specific language it is often best just to pick that Firefox version and install it. (Pick from https://www.mozilla.org/firefox/all/ no need to explicitly uninstall the original version, and certainly avoid using any third party uninstaller)

If you change over frequently then find a suitable language manager add-on, or possibly consider setting up separate Windows accounts, or separate Firefox profiles for other users.


Update: also see cor-el said

Note that you can also use a command line switch to start Firefox with a specific locale if you have multiple locales installed. You can create a desktop shortcut with the "-UILocale xx-xx" switch appended to the command line to start Firefox with a specific locale.
  • Start > Run: firefox.exe -UILocale en-US
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John99 971 solutions 13138 answers

Hi gertr, Firefox switches languages ok for me. So a few questions to see if I can figure out what is happening

  • Did this work previously has it just stopped working now ?
  • Do you have an English? German? or some other Firefox installed ?
  • Which language is the Firefox interface using at present ?
  • Have you got language packs installed (Which ones ?) & can you see them in about:addons languages tab ?
Hi gertr, Firefox switches languages ok for me. So a few questions to see if I can figure out what is happening * Did this work previously has it just stopped working now ? * Do you have an English? German? or some other Firefox installed ? * Which language is the Firefox interface using at present ? * Have you got language packs installed (Which ones ?) & can you see them in about:addons languages tab ? ** See also [[Use the Firefox interface in other languages with language packs#w_how-to-manage-language-packs]]_how-to-manage-language-packs

Question owner

John 99 thanks for your your comment.

I have the german firefox and language packs version installed.

After numerous trials following https://support.mozilla.org/en-US/kb/use-firefox-interface-other-languages-language-pack it worked to change from en to de. Why ??? I don't know

John 99 thanks for your your comment. I have the german firefox and language packs version installed. After numerous trials following https://support.mozilla.org/en-US/kb/use-firefox-interface-other-languages-language-pack it worked to change from en to de. Why ??? I don't know
John99 971 solutions 13138 answers

Chosen Solution

Glad it worked in the end {Use Firefox in another language} & thanks for letting us know.

Note if you want only one specific language it is often best just to pick that Firefox version and install it. (Pick from https://www.mozilla.org/firefox/all/ no need to explicitly uninstall the original version, and certainly avoid using any third party uninstaller)

If you change over frequently then find a suitable language manager add-on, or possibly consider setting up separate Windows accounts, or separate Firefox profiles for other users.


Update: also see cor-el said

Note that you can also use a command line switch to start Firefox with a specific locale if you have multiple locales installed. You can create a desktop shortcut with the "-UILocale xx-xx" switch appended to the command line to start Firefox with a specific locale.
  • Start > Run: firefox.exe -UILocale en-US
Glad it worked in the end {[[Use the Firefox interface in other languages with language packs]]} & thanks for letting us know. Note if you want only one specific language it is often best just to pick that Firefox version and install it. (Pick from https://www.mozilla.org/firefox/all/ no need to explicitly uninstall the original version, and certainly avoid using any third party uninstaller) If you change over frequently then find a suitable language manager add-on, or possibly consider setting up separate Windows accounts, or separate Firefox profiles for other users. * Add-on [https://addons.mozilla.org/firefox/search/?q=language+switcher+manager&appver=50.0&platform=windows Search] -> examples ** [https://addons.mozilla.org/firefox/addon/quick-locale-switcher/ Quick Locale Switcher] ** '''[https://addons.mozilla.org/firefox/addon/locale-switcher Locale Switcher]''' **[https://addons.mozilla.org/firefox/addon/language-manager Language Manager] ** [https://addons.mozilla.org/firefox/addon/simple-locale-switcherSimple Locale Switcher] * Tenforums tutorial [http://www.tenforums.com/tutorials/5440-user-account-add-windows-10-a.html How to Add a New User Account in Windows 10] * [[Use the Profile Manager to create and remove Firefox profiles]] (No need to try this if you just set up a Windows account they each have their own Firefox profile) ** Explanation: [[Profiles - Where Firefox stores your bookmarks, passwords and other user data]] ----- Update: also see ''cor-el [[#answer-942963|said]]'' <blockquote> Note that you can also use a command line switch to start Firefox with a specific locale if you have multiple locales installed. *https://developer.mozilla.org/Command_Line_Options You can create a desktop shortcut with the "-UILocale xx-xx" switch appended to the command line to start Firefox with a specific locale. *Start > Run: firefox.exe -UILocale en-US </blockquote>

Modified by John99

cor-el
  • Top 10 Contributor
  • Moderator
17538 solutions 158578 answers

Note that you can also use a command line switch to start Firefox with a specific locale if you have multiple locales installed.

You can create a desktop shortcut with the "-UILocale xx-xx" switch appended to the command line to start Firefox with a specific locale.

  • Start > Run: firefox.exe -UILocale en-US
Note that you can also use a command line switch to start Firefox with a specific locale if you have multiple locales installed. *https://developer.mozilla.org/Command_Line_Options You can create a desktop shortcut with the "-UILocale xx-xx" switch appended to the command line to start Firefox with a specific locale. *Start > Run: firefox.exe -UILocale en-US