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LanguageTool for Sublime Text 2/3


This is a simple adapter to integrate LanguageTool (an open source proof-reading program) into Sublime Text 2/3.


LanguageTool is an Open Source proof­reading program for English, French, German, Polish, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect and several grammar problems.


If you're using Package Control then open up the command palette (ctrl+shift+p), type install, press Enter then type languagetool and press Enter again.

To get the latest updates before they get released, install via Package Control: Add Repository. This will update your plugin with new commits as they are being pushed to the repo.


Open the file you want to proof-read then:

  1. Run a language check (ctrl+shift+c). Any problems identified by LanguageTool will be highlighted.
  2. Move between the problems using alt+down (next) and alt+up (previous).
  3. A panel at the bottom will display a brief description of the highlighted problem and suggest corrections if available.
  4. Begin typing to correct the selected problem or press alt+shift+f to apply the suggested correction.
  5. To ignore a problem, press alt+d.
  6. Auto-correcting a problem or ignoring it will move focus to the next problem.

All commands and their keyboard shortcuts are in the command palette with the prefix LanguageTool:.


The settings file for the plugin can be opened from the Preferences menu (PreferencesPackage SettingsLanguageToolSettings - User). Default settings are in the corresponding submenu item Settings - Default. Note that default settings are provided for reference and should not be edited as they may be overwritten when the plugin is updated or reinstalled. Instead, copy and modify any settings you wish to override to Settings - User.

Local vs. Remote Checking

The adapter supports local and remote LanguageTool servers. Remote checking is the default and works by submitting text over https to an api endpoint on (this can be changed in plugin settings). This public service is subject to usage constraints including:

  1. Maximum text size of 50Kb
  2. Access limited to 20 requests/minute per IP

(See for full details.)

Instead of using the public (remote) LanguageTool service, text can be checked using a local LanguageTool Installation. A local LanguageTool server can be started by the plugin itself using the command LanguageTool: Start Local Server (this requires the settings entry languagetool_jar to point to the local languagetool JAR file), or from the command line following the instructions in

The settings file contains remote and local server URL entries. A third option default_server indicates which of these is used when the command LanguageTool: Check Text is ran. As an added convenience, two more commands:

  • LanguageTool: Check Text (Local Server)
  • LanguageTool: Check Text (Remote Server)

are provided, which can be used to check text using the local/remote servers regardless of default_server. This can be used for one-off checks when it's desirable to use a particular server with certain pieces of text.


This plugin is freely available under GPLv2 or later.


Feel free to fork and improve. All contributions are welcome.


Proof-reading and grammar checker for English, French, German, Polish and 20+ other languages







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