how do I access bonus skills?
I am learning Turkish and there were bonus skills available. I purchased them with lingots but still can't see them anywhere. On my android app there are still 3 empty slots and in the browser version, they are nowhere to be found. If I go to the lingot store it says "equipped" next to the bonus skills. Where am I supposed to find and open them? Do I need to wait for a 3rd to become available (so far I've purchased 2). Is it because I need to master other skills first? If so, why were they offered to me already? I just don't understand how they work...