The LanguageTool plugin integrates the powerful grammar and spellchecking capabilities of LanguageTool into Obsidian. It allows users to perform advanced text checks, including grammar corrections, spellchecking, and language-specific enhancements. The plugin supports features like custom dictionaries, synonym suggestions, and multi-language spellchecking within a single document. Users can toggle automatic checks, clear suggestions, or manually check selected text or entire documents. For privacy-conscious users, it supports self-hosted LanguageTool instances. Premium users can access additional features with an API key configuration. This plugin is ideal for improving writing quality and handling multilingual documents efficiently.