Language Support

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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.

Rated 3 out of 5 stars (87)
208,537 users

Grammalecte [fr] (for Thunderbird) Requires Restart

French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.

Rated 5 out of 5 stars (3)
2,604 users

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (12)
34,005 users

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.

Rated 5 out of 5 stars (30)
3,540 users

AutoUp Requires Restart

Transform the first letter of a sentence in uppercase

Rated 3 out of 5 stars (7)
1,548 users

Dictionary Switcher Requires Restart

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (178)
14,942 users

Grammar Checker Requires Restart

Checks grammar using LanguageTool.

Rated 3 out of 5 stars (5)
2,917 users

WordReference Translator Requires Restart

Open a tab with WordReference's translation for the selected word. Through a floating link, or by pressing "D" key.

Rated 4 out of 5 stars (36)
5,431 users

Finnish spellchecker Requires Restart

Finnish open source Voikko-spellchecker for Mozilla and needed libraries.

Rated 3 out of 5 stars (82)
5,303 users

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).

Rated 4 out of 5 stars (23)
1,012 users

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

Rated 4 out of 5 stars (26)
6,835 users

www.Translate Requires Restart

Multi-Translator from Google, Bing and Pragma.
Translation tool for your Firefox and Thunderbird with a simple and friendly interface.

Rated 4 out of 5 stars (29)
5,669 users

AVIM Requires Restart

Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
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Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.

Rated 5 out of 5 stars (38)
1,990 users

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.

Rated 5 out of 5 stars (2)
2,182 users

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!"

Rated 5 out of 5 stars (3)
1,546 users

Rikaichan Japanese-French Dictionary File Requires Restart

A dictionary file for Rikaichan.

Not yet rated
2,561 users

EHTip Requires Restart

Word translation in tooltip with English⟷Croatian dictionary already incorporated.

Rated 5 out of 5 stars (63)
1,532 users

Look Up in Dictionary Requires Restart

Looks up a selected word in OS X's Dictionary.app

Rated 5 out of 5 stars (43)
1,545 users

Right Encoding Requires Restart

Adds the Character Encoding menu to the context menu

Rated 4 out of 5 stars (18)
3,145 users

Rikaichan Japanese-German Dictionary File Requires Restart

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (1)
3,184 users