Quick Locale Switcher: Handle multiple locales and dictionaries in Firefox and Thunderbird

Quick Locale Switcher is an extension for Firefox and Thunderbird, providing a function to toggle between different locales to optionally switch:

• The used dictionary (active by default)
• Accept-Language-Header (active by default)
• The GUI (inactive by default)

See the following for installation notes:

• Firefox
• Thunderbird

Don't forget to install additional dictionaries to get spell-checking support for the languages you want to use:

• Firefox dictionaries
• Thunderbird dictionaries

If there is more than one dictionary for your language, I recommend the ones based on Hunspell.

The add-on is especially helpful when you are writing mails and text in different languages. You probably missed quick access to the correct dictionary/spell-checker but Quick Locale Switcher is a clever solution to solve this problem.