Occasionally I encounter minor mistakes in the audio transcript - some lines are missing a bracket in the time indicator (lines like "1:2:3]: CONTENT" that I assume should have had a "[" at the beginning for the transcript displaying code to parse it correctly), some lines are mixed up etc. and it would be great if there was a button somewhere to suggest minor fixes. For example in French 11.1 around 3:15, Eric and Anne's lines are mixed up. These are small enough that it's not worth posting to a forum, but if there was a button where we could quickly and instantly suggest fixes and point out the exact time or the question that has the problem, it'd be great. Later you can validate and then apply the suggestions if needed.
Similarly, the same button could be used to give feedback to a specific lesson. I would've wanted to give feedback on French lesson 10.1 for example - it had very long sentences and the phrases we're repeating after Eric/Anne were too short. For example in 17:43, phrases are "Alors", "je vous conseille", "un véhicule", "de catégorie B", "au moins", "c'est-à-dire", "une routière", "du genre", "Renault Laguna", "ou bien Volkswagen Passat" - repeating them piece by piece takes quite a bit of time in an already long lesson. This is not a very big deal but if you allow people to give feedback for every lesson, you can look at the aggregated feedback to see which lessons you may want to improve. You can also let people rate each lesson for the lazy students :)