I accidentally changed my language to French...
so I cant understand anything
So if you don't like it change it back, press the little flag icon, at the bottom of the flag icons is a thing for add a new language, press that. All the languages from french will show , but at the top is a bit which says some thing like je parle - switch that to anglais, or english and then pick your french course and go to the course. Everything should reset to english.