Language Support
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Automatic Dictionary
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
Grammalecte [fr] (for Thunderbird)
Requires Restart
French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.
Simple Locale Switcher
Requires Restart
An easier management of the user interface language
Quick Locale Switcher
Requires Restart
Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
Dictionary Switcher for Thunderbird
Requires Restart
Toggles spelling dictionaries automatically or manually and displays the currently selected one in the status bar.
Now merged with Dictionary Switcher v1.3 for Firefox/SeaMonkey
Dictionary Switcher
Requires Restart
Toggles dictionaries automatically or manually and displays the currently selected one
Zombie Keys (Multilanguage Keyboard)
Requires Restart
Enter accents, diacritics, diaeresis, umlauts, ligatures etc. with keyboards of various countries (us,uk,ie,fr,it,ru,de,sv) - via easy to remember shortcuts or menu. Also supports all textboxes of the application (such as search, filters).
Quick Locale Switcher 2
Requires Restart
Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
www.Translate
Requires Restart
Multi-Translator from Google, Bing and Pragma.
Translation tool for your Firefox and Thunderbird with a simple and friendly interface.
Finnish spellchecker
Requires Restart
Finnish open source Voikko-spellchecker for Mozilla and needed libraries.
No Small Text
Set a minimum text size for all web content. Use the toolbar button to switch it on and off. NEW: Three preset sizes. NEW: Use mouse scroll on the toolbar button.
Rikaichan Japanese-English Dictionary File
Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
Transliterator
As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.
South African English spell checker
Requires Restart
The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.
"No more eina, just a lekker spell checker!"
WordReference Translator
Requires Restart
Open a tab with WordReference's translation for the selected word. Through a floating link, or by pressing "D" key.
Babylon Dictionary Word Search
Requires Restart
Find the definition for a selected word in a web page or an email.
Right click over the selected word, choose the option "Search in Babylon" and that's it! You will have a new window with the definition of the selected word.
To create your own collections, you must have a Mozilla Add-ons account.