A small backend complication in my websites filters -- 2

Hi, I have an e-learning WordPress website in which people can upload courses, I have already added the filters from the front end but I just want someone to do the backend work. The task would not take much time as you just have to fetch the information from the form of my website to the filters so that the filters work properly. This is the website page in which the filter of language is there - [login to view URL]