Unable to enter the Chinese fonts

Hi;

    I work in Ubuntu 64bit . and i use draftsight 2016 SP2 , the language I choose the simplified chinese(i changed the english also ,but it can't  solution ) i can't to enter the chinese fonts.but on the other soft i can enter it .and the chinese language is just translate the menu bar but the commad and the options is keeping english . i used draftsight on the windows ,but it can't this problem. i don't know what happen . please help .