We've improved the way LanguageTool works with Wikipedia:
- The text checking at http://www.languagetool.org/wikicheck/ now allows you to submit any corrections directly to Wikipedia. You will end up in Wikipedia's "Show changes" view, so you can make sure that nothing gets messed up.
- http://community.languagetool.org/corpusMatch/list?lang=en contains a "Check now" link now for each potential error which re-runs the checks with the current version of the article.
This is still in beta and will be for a long time, as extracting plain text from Wikipedia is very difficult. So there are cases where it won't work properly. Still, we're looking for feedback.