for the life of me I can’t make it be unselected. try it for your self. from web page select setting and then de-select the undetermined and select a language (for example english) and then press save at the bottom. come back to setting page and see undetermined be selected again. the English or other languages you selected are saved correctly but for the life of me I cant disable undetermined.

it pollutes my feed with german french and other languages that I don’t understand.