LT_EX LS (LT_EX Language Server) implements a language server according to the Language Server Protocol (LSP) and provides grammar and spelling errors in markup documents (L^AT_EX, Markdown, etc.). The documents are checked with LanguageTool.

Typically, you start the language server (either locally or remotely), you send the language server your L^AT_EX or Markdown document, and it will respond with a list of the grammar and spelling errors in it. To use LT_EX LS in this way, you have to use a language client (usually an editor or an extension of the editor) that communicates with LT_EX LS according to the LSP.

However, it is also possible to supply LT_EX LS paths to files and directories to be checked as command-line arguments. In this mode, LT_EX LS will print the results to standard output, and no language client is necessary.

The reference language client of LT_EX LS is the LT_EX extension for Visual Studio Code (vscode-ltex), whose development LT_EX LS follows closely and vice versa.

Find more information (how to install, how to use, etc.) at the website of LT_EX.

• Supported markup languages: BibT_EX, ConT_EXt, Git commit messages, L^AT_EX, Markdown, Org, Quarto, reStructuredText, R Markdown, R Sweave, XHTML
• Comment checking in many popular programming languages (optional, opt-in)
• Comes with everything included, no need to install Java or LanguageTool
• Offline checking: Does not upload anything to the internet
• Supports over 20 languages: English, French, German, Dutch, Chinese, Russian, etc.
• Replacement suggestions via quick fixes
• Completion support for English and German
• User dictionaries
• Multilingual support with babel commands or magic comments
• Possibility to use external LanguageTool servers
• Extensive documentation