LanguageTool

A proof-reading tool for English, Spanish, German, Polish, Chinese, French, Russian, Italian, Dutch, Ukrainian and more languages

Version 5.7-SNAPSHOT (2021-xx-xx) Copyright (C) 2005-2022 the LanguageTool community and Daniel Naber (www.danielnaber.de)
https://www.languagetool.org

Requirements

• Java 8 or later
• For LibreOffice/OpenOffice.org integration:
  • LibreOffice 4.2.4 (or later) or
  • Apache OpenOffice 4.1.2 (or later)

Usage

LibreOffice/OpenOffice

To integrate LanguageTool into LibreOffice or OpenOffice.org, you can use two methods:

• Double-click LanguageTool-5.6.oxt. The extension should start installing. Follow the on-screen instructions.

• If the above method doesn't work, call Tools > Extension Manager > Add... in LibreOffice/OpenOffice.org and browse for the LanguageTool-5.6.oxt file.

Close and restart LibreOffice/OpenOffice.org Writer. Remember to close the QuickStarter as well if you use it. Type text with an error, e.g. "Feel tree to do so." - make sure the text language is set to English for this example.

You should see a blue underline under the word "tree" after about a second. Opening the context menu with the right mouse button on that word offers you a short description of the error and a correction ("free").

If you are using LibreOffice and you want to check English or Russian texts: Use Options -> Language Settings -> Writing Aids -> Edit... in the Tools menu to disable LightProof and enable LanguageTool for English.

Note that there will also be a new menu item "LanguageTool" under the Tools menu. If the native spelling and grammar dialog doesn't check grammar, make sure that the check box Check Grammar is checked in it (if the window closes because of no mistakes in the document, simply make any spelling mistake to make it open for a longer time, and check the box). Check also if LanguageTool is visible under Grammar in Tools > Options > Language Settings > Spelling for your language. Note: you can disable the grammar check without uninstalling LanguageTool simply by clearing the check box next to LanguageTool in the same dialog.

Please see https://www.languagetool.org/issues/ if you experience problems.

Stand-alone version

To use the stand-alone version, double-click on the languagetool.jar file or call java -jar languagetool.jar from the command line.

Command-line version

To check plain text files from the command line, use

java -jar languagetool-commandline.jar -l xx <filename>

with xx being the code for your language, e.g. en-US for American English or just en for English without spell checking activated.

If you get a java.lang.OutOfMemory error, try increasing the Java heap size as follows, where 4096 is the size in megabytes (use more or less, depending on your file size and memory available).

java -Xmx4096M -jar languagetool-commandline.jar -l xx <filename>

Java API

See https://dev.languagetool.org/java-api

HTTP API

See https://dev.languagetool.org/public-http-api and https://languagetool.org/http-api/swagger-ui/#/default

Source code history

On 2013-08-08 we moved our source code from Subversion at Sourceforge to git at github (https://github.com/languagetool-org/languagetool). Most history has been preserved. History in git is lost for:

• binary files
• branches and tags

If you need this history, the old subversion repository is still available at http://svn.code.sf.net/p/languagetool/code/trunk/languagetool/.

License

Unless otherwise noted, this software is distributed under the LGPL, see file COPYING.txt

See third-party-licenses/README.txt for the copyright of the external libraries.

Frequency data

Some language's spelling dictionaries contain frequency data. This is taken from the Mozilla-B2G Gaia project (https://github.com/mozilla-b2g/gaia/) which again takes it from Spell On It (http://www.spellonit.com/downloads/frequencies/). The frequency data is released under Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).

Asturian

See org/languagetool/resource/ast/README.txt and org/languagetool/resource/ast/hunspell/LICENSES*.txt

Belarusian

See org/languagetool/resource/be/hunspell/README.txt

Breton

See org/languagetool/resource/br/README.txt and See org/languagetool/resource/br/hunspell/README.txt

Catalan

See org/languagetool/resource/ca/README.txt

Chinese

See org/languagetool/resource/zh/README.txt

Danish

See org/languagetool/resource/da/README.txt and org/languagetool/resource/da/spelling/README_da_DK.txt

Dutch

See org/languagetool/resource/nl/README.txt and org/languagetool/resource/nl/spelling/README.txt

English

See org/languagetool/resource/en/pos-readme.txt and org/languagetool/resource/en/12dicts-readme.html

Esperanto

See org/languagetool/resource/eo/hunspell/README_eo.txt

French

See org/languagetool/resource/fr/README_lexique.txt and org/languagetool/resource/fr/hunspell/fr_FR.README

Galician

See org/languagetool/resource/gl/README.txt and org/languagetool/resource/gl/hunspell/README-gl-ES.txt and LICENSES-en.txt

German

See org/languagetool/resource/de/README.txt and org/languagetool/resource/de/hunspell/*README.txt

Greek

See org/languagetool/resource/el/README.txt and org/languagetool/resource/el/hunspell/README_el_GR.txt

Italian

See org/languagetool/resource/it/README.txt and org/languagetool/resource/it/hunspell/README_it_IT.txt

Japanese

No POS or spelling data included in these sources.

Khmer

See org/languagetool/resource/km/README.txt

Malayalam (inactive)

See org/languagetool/resource/ml/README.txt

Persian

See org/languagetool/resource/km/README.txt

Polish

See org/languagetool/resource/pl/README.txt and org/languagetool/resource/pl/hunspell/README_en.txt

Portuguese

See org/languagetool/resource/pt/portuguese_dict_README and org/languagetool/resource/pt/hunspell/README*.txt

Romanian

See org/languagetool/resource/ro/README.txt and org/languagetool/resource/ro/hunspell/README_*.txt

Russian

See org/languagetool/resource/ru/README.txt and org/languagetool/resource/ru/hunspell/README.txt

Serbian

See org/languagetool/resource/sr/README.md and org/languagetool/resource/sr/dictionary/ekavian/README_hunspell.txt and org/languagetool/resource/sr/dictionary/jekavian/README_hunspell.txt

Slovak

See org/languagetool/resource/sk/README.txt

Slovenian

See org/languagetool/resource/sl/hunspell/README_sl_SI.txt

Spanish

See org/languagetool/resource/es/hunspell/README_es_ES.txt and org/languagetool/resource/es/README.txt

Swedish

See org/languagetool/resource/sv/hunspell/LICENSE*.txt and org/languagetool/resource/sv/README.txt

Tagalog

See org/languagetool/resource/tl/README.txt

Tamil

See org/languagetool/resource/ta/README.txt

Ukrainian

See org/languagetool/resource/uk/README.txt