Hi. Just wanted to give some feedback on the site. First, I think you've done a great job with the UI - it's a very simple design yet packs a lot of functionality into it and the functionality is always easily accessible. This isn't easy to do, so kudos to you for pulling it off. Also, I havent noticed any errors being thrown, which also isn't easy to do. I do see a two areas that can be improved (I think).

1) On the content details page (e.g. https://www.lingq.com/en/learn/fr/web/reader/3531831) , the 3 dot menu doesnt allow you to go to the "View Course" page only the "View Lesson Info". I think the "View Course" link should be viewable at this level. Currently you only display the link on the List pages (e.g. https://www.lingq.com/en/learn/fr/web/library).

2) For the challenges (e.g. https://www.lingq.com/en/learn/fr/web/community/challenges/hardcore90days_032026_fr). It doesnt appear that your algo for calculating the ranking / leader board is weighed properly. Primarily, "LingQ Learned" should be given more (maybe the most) weighting. Currently, you use a mix of reading number of words, listening hours, etc. Listening hours especially can be "gamed". For example someone can just import a novel and hit the play button, not listen to a word of the playback, and yet get 40 hours of listening "credit". One way to factor out "gaming the system" like this, would be to ensure users have actually ingested the content, and ingq's learned is certainly one way to do it. If you just look at the leaderboards and view the stats of different users, you can easily see which users are actually trying to learn the language, rather than those who are just trying to bump up their position on the leaderboard -- and lingqs iearned is definitely one way to see this (really, only people who are trying to learn the language are going to spend any time, and have the ability to get correct answers, on the learned lingqs).