languagetool
LanguageTool is an Open Source proofreading software for English, French, German, Polish, Russian, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect.
About
LanguageTool is an open source proofreading server that provides grammar, style, and spell checking across 20+ languages including English, French, German, Polish, and Russian. Unlike basic spell checkers, it detects contextual errors through rule-based analysis. It's designed fo…