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Brazilian Portuguese Dictionary (New Spelling)
The same spellchecker shipped with the Brazilian version of Firefox.
German Dictionary, classical spelling standards
German Dictionary according to the classical spelling standards for spell-checking in Firefox and Thunderbird
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.
United States English Spellchecker
This dictionary is no longer maintained. Use this dictionary instead.
Grammalecte [fr] (for Thunderbird)
French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.
Brazilian Portuguese Dictionary (Former Spelling)
The same spellchecker shipped with the Brazilian version of Firefox, just using the former spelling (which is valid until January 1st 2016).
German Dictionary (de-DE), classical and reformed
German Dictionary according to the classical or reformed spelling standards for spell-checking in Firefox and Thunderbird ++
Deutsches Wörterbuch nach den bewährten oder reformierten Regeln für die Rechtschreibprüfung in Firefox und Thunderbird
Slovak spell checking dictionary
Slovak spell checking dictionary for Mozilla applications (based on the "open-source" dictionaries by Zdenko Podobný).
Urdu Dictionary
This dictionary is based on the urdu word list provided at www.crulp.org and the word list compiled by our friends at http://www.urduweb.org/mehfil/
Finnish Spellchecker
Finnish (fi-FI) spellchecker dictionary for Firefox, Thunderbird and SeaMonkey .
Russian spellcheck dictionary (yo). Based on AOT.
Russian spellchecker dictionary. Based on works of AOT.ru group. (only yo)
Correcteur Occitan-Languedocien
Correcteur orthographique Occitan Languedocien
Corregidor ortografic Occitan lengadocian
Scottish Gaelic spell checker
An open (traditional spellings and GOC inclusive) spell-checking addon for Scots Gaelic, which will correct over 1.7 million words, making it the biggest spell-checking dictionary to date.
Kurdish Sorani Spellchecker
Kurdish Sorani Spellchecker for Firefox, Thunderbird and SeaMonkey by Dr Yadgar Balaky and Ranjbar Balisane.
To enable, right-click in a multi-line text box, select "Languages", then "ku-CKB".
Словникъ Български
This is a Bulgarian spell-checker based on the historic orthography from 1899 known as "Ivanchevski pravopis". It is using the Mozilla built-in spell-checking engine (hunspell).
British-English Dictionary (GB)
A strict British-English spell checker dictionary for Firefox, Thunderbird and SeaMonkey. This dictionary only includes words conforming to the preferred standard of British-English spelling.
To create your own collections, you must have a Mozilla Add-ons account.
