Since you have the feature of learning pronunciation/description implemented anyway, it would be a great improvement if you added this feature to every (non-language) topic.
When doublechecking example topics, i see that you already did that in the last days. Great! The new fields are not learnable yet, but i am sure you are working on it. I really like the field "description" in 'famous people', which gives the course creator the flexibility to choose an extra information which is worth learning. The alternative would be to create multiple fields with fixed intention, like "born", "died", "profession" for famous people, but this will take a lot of trial and error for each individual topic until a good solution for all kinds of courses is found.