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LanguageTool is an Open Source proofreading tool. This website lists LanguageTool's error detection rules and applies them to Wikipedia content for demonstration and testing purposes.


Browse Rules

LanguageTool uses rules to detect errors. Each rule represents a potential error in the text to check. Have a look at all rules of all languages here.

Check any Wikipedia page


Check Rules' Results

We use LanguageTool on Wikipedia data to test which rules work well and which need more work. If there's a real error you're encouraged to fix it in Wikipedia, but note that the check may not be up-to-date and the error may have been fixed already.

Random selection of LanguageTool results when run on Wikipedia:


  • Αταίριαστη αγκύλη ή παρόμοιο σύμβολο: [Visit Rule]
    ...ologen, Leipzig 1981. Zum Begriff des Sakramentes (= Eichstätter Hochschulreden, Bd. 79), München 197...
    Login to vote · Visit Wikipedia
  • Αταίριαστη αγκύλη ή παρόμοιο σύμβολο: [Visit Rule]
    ...ξι χωριών που βρίσκονταν στην ίδια κοιλάδα), και γ) το ιδίωμα της κυρίως Καππαδοκίας. Η περιοχή αποτε...
    Login to vote · Visit Wikipedia
  • Αταίριαστη αγκύλη ή παρόμοιο σύμβολο: [Visit Rule]
    ...δ. Εξάντας, Αθήνα 1993. Ο ευρωπαϊκός μηδενισμός. α) Μετάφρ. Ελένη Καλκάνη. "Δαμιανός", Αθ. χ.χ. β) Με...
    Login to vote · Visit Wikipedia
Other random examples · All matches · User votes

Visit the LanguageTool homepage to download LanguageTool as an extension for LibreOffice or OpenOffice.org