There are a couple misspellings that I've noticed, plus some awkward phrasing. Maybe get someone else to look over the copy on your site? This looks really helpful otherwise.
Sorry for that. We're some french guys and we try to do our best, but for now we did not have the chance to hire someone to correct that.
There's a "red thumb" on the left of each tip, you can warn us about misspellings with it, it will be widely appreciated :)