Language Support



Type in accented letters, international characters or symbols into Firefox or Thunderbird, either simply by using a context menu (there being support for many languages), or quickly by keyboard macro (you can even define your own).

Rated 4 out of 5 stars (69)
3,579 users

Asystent Nauki Angielskiego

Pomoc w nauce angielskiego i rozumienia tekstów przez tłumaczenie pojedynczych, rzadkich słów.

Not yet rated
29 users

Automatic Dictionary No Restart

Extension that remembers the language of the spellchecker used when composing and switches to it every time you write to that person.

Rated 5 out of 5 stars (20)
2,580 users


Transform the first letter of a sentence in uppercase

Rated 3 out of 5 stars (7)
1,300 users


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

Rated 5 out of 5 stars (30)
4,883 users

Babylon Dictionary Word Search

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.

Rated 4 out of 5 stars (41)
5,124 users

Bosnian spell checker

This is a comprehensive spell checker that contains more than 300 000 words of the Bosnian language.

Rated 5 out of 5 stars (1)
21 users


CantoFish is a popup Cantonese-English dictionary for Firefox. It contains over 200,000 entries and works with both traditional and simplified Chinese characters. The Yale and Jyutping romanization systems are supported, as well as Mandarin pinyin.

Rated 5 out of 5 stars (23)
660 users

Character Identifier

This extension adds a context menu item for selected text that provides more information (from the Unicode database) about the characters...

Rated 4 out of 5 stars (10)
405 users

Character Palette

Firefox toolbar for selecting strange characters that are not on my keyboard.

Rated 3 out of 5 stars (12)
601 users

Chat RTL

Fixing the Chat so it would support RTL languages (i.e. Hebrew, Arabic) better.

Not yet rated
61 users


highlight code in email.

Rated 3 out of 5 stars (1)
57 users


Compose messages Right-to-Left or Left-to-Right. Unlike other addons which change the direction of typing of the whole message, this addon allows you to control the direction of an individual paragraph.

Rated 4 out of 5 stars (10)
16 users


dictCheck - Double click on any english word in a page to get the polish meaning. Uses fast online dictionary.
Simple and easy! Enjoy!

Rated 5 out of 5 stars (6)
647 users

Dictionary for recipient No Restart

Sets the spell check dictionary based on the first recipient

Not yet rated
41 users

Dictionary Switcher

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (171)
23,494 users

Dictionary Switcher for Thunderbird

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)
10,230 users


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

Rated 5 out of 5 stars (59)
5,041 users

English - English Dictionary

This is an English dictionary for looking up words in English.

Select a word using your mouse and find its meaning in English!

Rated 2 out of 5 stars (9)
5,779 users


Insert inline LaTeX equations into e-mail messages.

Rated 5 out of 5 stars (22)
173 users