Since version 7.4 of LibreOffice, the grammar and style checker by LanguageTool can also be accessed internally. Compared to using this internal access, the extension offers the following advantages:

• The application runs on the local computer. Therefore, no remote server is required (the use of a remote server, including the LanguageTool Premium service, is still supported).

• All rules that work at the full-text level are also supported across paragraph boundaries (e.g., opening and closing quotation marks are recognized even if they are more than one paragraph apart).

• In addition to LibreOffice's spell checker, LanguageTool's is also used.

• A proprietary caching mechanism is used, which significantly speeds up repeated work on long texts (checking unchanged texts does not have to be repeated, which is time-consuming. After loading a text that has already been checked once, all errors found are displayed almost immediately).

• A separate WritingTool check dialog is used, which is very performant (it has been optimized for WritingTool's internal caching mechanisms).

• Manual grammar and style checking of Impress and Calc documents using the WritingTool check dialog is supported.

• Using a configuration dialog, users can make the following settings, for example:

  • Easily activate or deactivate optional rules

  • Easily deactivate or reactivate default rules

  • Define custom colors and styles for rule groups or individual rules

  • Change parameters for some special rules

  • Define profiles for checking different document types

  • The extension offers the possibility of statistical analyses, such as frequently used words, filler words, etc. (currently only for some languages).