LanguageTool Community beta

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:


  • Tveir punktar í röð: [Visit Rule]
    ...n um Einveldið í Danmörku undirrituð af Friðriki 3.. 1.1. Ódagsettir atburðir Sjö bjarndýr gengu á l...
    Login to vote · Visit Wikipedia
  • Rita skal annaðhvort í einu lagi í fleyguðu tengingunni annaðhvort ... eða: [Visit Rule]
    ...himnuna. Um umfrymið hríslast frymisnet sem getur annað hvort verið slétt eða kornótt eftir tegund frumunnar. R...
    Login to vote · Visit Wikipedia
  • Tveir punktar í röð: [Visit Rule]
    ...sikon. 1977. Aðalritstjóri: Jørgen Bang, cand. mag.. Gyldendalske Boghandel, Nordisk Forlag A.S. Kaupm...
    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