If you found a mistake in the original English content, please find that content on the English website.
If it is a mistake in an exercise, you can just click the “Report a mistake” button on the bottom right (see figure below).
If it is a mistake in a video or an article, you can just click “Ask a question” button and choose “report a mistake in the video/article” after it pops up.
If you find a bad translation, please report to the Language Advocates. Don’t forget to include a link to the page, a screenshot of the bad translation and timestamps. It will be helpful if you can provide details as much as possible.
Please understand that we are not able to respond to all reports submitted, as we are still a small team.