Can you give me some help on Polylang with additional css please?

Hi there, Does anyone can give me some help on a Multi language plugin Polylang. My question is pretty easy, for someone who codes. I wanna change the font size of polylang switcher menu. What polylang does is adding an extra link on a menu, however I wanna that option with a smaller font size. I was trying to find CSS Class for that link but doesnt show. So in a nutshell what I'm after is some additional css code to make that small change in the font size of polylang switcher. Anyone? Thanks