May I suggest that the "I speak" dropdown does NOT include non-languages.
Currently it shows all the course categories and is not relevant.
I've also wondered if you should have TWO "I want to learn" dropdowns.
One for "I want to learn a language" and another for "I want to learn a subject". (or " … a non-language subject"
It would reduce the amount of scrolling (but I see one can type the first letter and it goes to it - brilliant).
However the advantage of seeing every subject is it might inspire people to try something else.