LanguageTool is a multilingual writing assistant that checks spelling, grammar, punctuation, casing, and style while you write, and adds an AI based paraphraser that can restate a sentence in a more formal, fluent, simple, or concise form. It presents itself as the most international writing tool in its category: the homepage says it works in more than 30 languages and dialects, with English, Spanish, German, French, Dutch, and Portuguese as its main languages and six standard varieties of English to choose from. The checker runs where writing already happens. Browser add ons cover Chrome, Firefox, Edge, Safari, and Opera and follow you across the web, including email, blog posts, and social posts, automatically detecting the language in use; the homepage notes that no text is stored by the browser add on. A dedicated editor offers a distraction free writing experience with a personal dictionary, securely stored texts, writing statistics that track productivity, languages used, errors made, and suggestions applied, and a Picky Mode for advanced punctuation, style, and typography suggestions. Desktop apps cover Windows and macOS, and integrations include Microsoft Word, Google Docs through the browser add on, and office programs more broadly, so one account carries the same checking across devices and apps. The depth is in the checks themselves. Beyond typos, LanguageTool flags incorrect word order, wrong tenses, agreement errors, missing and superfluous commas, word confusion, double negation, repetition, overused phrases, wordiness, informal wording, inconsistent numbers, dates, spacing, and currency formats, and it can spot a wrong name in an email greeting. Synonyms appear on a double click, and error cards explain each suggestion in place while you type. Access is split qualitatively into a free Basic version, a paid Premium version for professionals, and team accounts. The homepage says the free version corrects spelling plus simple punctuation and some style mistakes, while Premium shows all errors. LanguageTool states that Premium performs more than 20,000 additional checks across its main European languages, raises the per field character limit far above the Basic allowance, adds unlimited AI sentence paraphrasing, and adds a personal style guide for consistent wording. Teams adds user management, a shared team style guide, and a team dictionary. Premium is sold on monthly and yearly intervals, can be cancelled at any time with the subscription running to the end of the paid period, and carries a money back guarantee window that LanguageTool states on its Premium page; students receive a discount, per the homepage FAQ.
