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German Dictionary, classical spelling standards
German Dictionary according to the classical spelling standards for spell-checking in Firefox and Thunderbird
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This dictionary is no longer maintained.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.
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
Vietnamese Dictionary
Enables spell checking in Vietnamese with a wordlist based on Hồ Ngọc Đức’s Free Vietnamese Dictionary Project.
Markov Dictionary Switcher
Requires Restart
Based on Dictionary Switcher but more than a thousand times faster and you can choose dictionaries that you want to use. Detects the language of the message that you are composing and changes the spelling dictionary.
Armenian spell checker dictionary
Объединённый словарь русской орфографии
Словарь для проверки орфографии содержащий 450+ тысяч русских и 95+ тысяч английских слов.
French-Current (FRANCE) spell checker Dictionary
Only ONE dictionary it's enough ! This one will spell french in a way that most France's people do today — June 2014 Edition .
Kannada Spell Checker
Medical Spell Checker with OpenMedSpel
OpenMedSpel for Mozilla Firefox, Thunderbird, and SeaMonkey is free and open source medical spell checking dictionary that includes nearly 50,000 medical terms ranging from abdominis to zygomatic.
Interlingue Spell Checker
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).
Bulgarian+Germany Spell Checker
Едновременна проверка на правописа за български и немски езици
Simultaneous spelling of Bulgarian and German
Gleichzeitig Schreibweise von bulgarischen und deutschen
Interlingua - Spelling dictionary
Dictionario orthographic pro Interlingua.
Spelling dictionary for Interlingua.
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.
Text Insert: Templates/Instant Spell Check
Email composer:
*Upper case the first letter of nouns, names, or words at sentence start
*Android(TM) like spellcheck/suggest alternatives (DE, EN, ES, FR,NL)
*Insert styled text, images, tables with shortcuts
*Define shortcut-replacements.
Grammar and Spell Checker — LanguageTool
Check your emails for spelling and grammar issues
To create your own collections, you must have a Mozilla Add-ons account.
