LanguageTool is an Open Source proofreading software for English, Spanish, French, German, Portuguese, Polish, Dutch, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect.
- Jobs at LanguageTool
- How to run your own LanguageTool server
- HTTP API documentation
- How to use our public server via HTTP
- How to use LanguageTool from Java (Javadoc)
The LanguageTool core (this repo) is freely available under the LGPL 2.1 or later.
Try one of the following projects for a community-contributed Docker file:
- https://github.com/Erikvl87/docker-languagetool (Docker Hub)
- https://github.com/silvio/docker-languagetool (Docker Hub)
The development overview describes how you can contribute error detection rules.
For more technical details, see our dev pages.
Scripted installation and building
To install or build using a script, simply type:
curl -L https://raw.githubusercontent.com/languagetool-org/languagetool/master/install.sh | sudo bash <options>
If you wish to have more options, download the
install.sh script. Usage options follow:
sudo bash install.sh <options> Usage: install.sh <option> <package> Options: -h --help Show help -b --build Builds packages from the bleeding edge development copy of LanguageTool -c --command <command> Specifies post-installation command to run (default gui when screen is detected) -q --quiet Shut up LanguageTool installer! Only tell me important stuff! -t --text <file> Specifies what text to be spellchecked by LanguageTool command line (default spellcheck.txt) -d --depth <value> Specifies the depth to clone when building LanguageTool yourself (default 1). -p --package <package> Specifies package to install when building (default all) -o --override <OS> Override automatic OS detection with <OS> -a --accept Accept the oracle license at http://java.com/license. Only run this if you have seen the license and agree to its terms! -r --remove <all/partial> Removes LanguageTool install. <all> uninstalls the dependencies that were auto-installed. (default partial) Packages(only if -b is specified): standalone Installs standalone package wikipedia Installs Wikipedia package office-extension Installs the LibreOffice/OpenOffice extension package Commands: GUI Runs GUI version of LanguageTool commandline Runs command line version of LanguageTool server Runs server version of LanguageTool
Alternate way to build from source
Before start: you will need to clone from GitHub and install Java 8 and Apache Maven.
Warning: a complete clone requires downloading more than 500 MB and needs more than 1500 MB on disk. This can be reduced if you only need the last few revisions of the master branch by creating a shallow clone:
git clone --depth 5 https://github.com/languagetool-org/languagetool.git
A shallow clone downloads less than 60 MB and needs less than 200 MB on disk.
In the root project folder, run:
mvn clean test
(sometimes you can skip Maven step for repeated builds)
./build.sh languagetool-standalone package -DskipTests
Test the result in
./build.sh languagetool-wikipedia package -DskipTests
Test the result in
./build.sh languagetool-office-extension package -DskipTests
Test the result in
languagetool-office-extension/target, rename the
*.oxt to install it in LibreOffice/OpenOffice.
Now you can use the bleeding edge development copy of LanguageTool
*.jar files, be aware that it might contain regressions.
How to run under Mac M1 or M2
- Install Brew for Rosetta:
arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
- Install openjdk for Rosetta:
arch -x86_64 brew install openjdk
- Install Maven for Rosetta:
arch -x86_64 brew install maven
- Now run build scripts
Unless otherwise noted, this software - the LanguageTool core - is distributed under the LGPL, see file COPYING.txt.