Language Support

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German Dictionary for Spelling

This is a German spelling dictionary, for finding spelling mistakes.
Select a text in German appearing on any web page and get a spelling check for it immediately!

Rated 1 out of 5 stars (1)
6,260 users

Spanish Dictionary for Spelling

Select a text in Spanish appearing on any web page and get a spelling check for it immediately!

Seleccione un texto en español que aparece en cualquier página web y obtener una revisión ortográfica de inmediato!

Not yet rated
2,249 users

AutoUp

Transform the first letter of a sentence in uppercase

Rated 3 out of 5 stars (6)
1,299 users

Quick Locale Switcher

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 4 out of 5 stars (80)
262,636 users

Todoist for Thunderbird

Todoist is a leading online task manager and we manage millions of todos! Todoist for Thunderbird makes it super easy to manage your todos and email directly from Thunderbird.

Watch a short video:
https://www.youtube.com/watch?v=VixEQJb5Qc0

Rated 4 out of 5 stars (11)
6,614 users

Automatic dictionary switching 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 (17)
2,778 users

Simple Locale Switcher

An easier management of the user interface language

Rated 5 out of 5 stars (4)
8,928 users

South African English spell checker

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)
3,032 users

Grammar Checker

Checks grammar using LanguageTool facilities.

Rated 4 out of 5 stars (4)
2,653 users

Dictionary Switcher

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (162)
27,608 users

SelectionSK

Pops up user menu with useful tools (copy, highlight, translation, search, etc.) when text is selected with the mouse

Rated 5 out of 5 stars (61)
1,591 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)
12,265 users

Quick Translator

The most lightweight and easiest translator. Translate between more than 80 languages with one click or a hot key. Translate from one word to a whole page.

Rated 5 out of 5 stars (445)
269,466 users

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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)
4,112 users

Rikaichan Japanese-French Dictionary File

A dictionary file for Rikaichan.

Not yet rated
2,929 users

Rikaichan Japanese Names Dictionary File

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (3)
17,667 users

Rikaichan Japanese-English Dictionary File

This is a dictionary file add-on for the Rikaichan extension.

Rated 5 out of 5 stars (4)
42,099 users

Zombie Keys (Multilanguage Keyboard)

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 5 out of 5 stars (22)
1,551 users

WordReference Translator

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

Rated 3 out of 5 stars (29)
8,438 users

Finnish spellchecker

Finnish Spellchecker

Rated 4 out of 5 stars (96)
8,217 users