Dishnet users cannot submit completed lessons
For Duolingo to work on dishnet you must disable WebAcceleration via your modem config. These instructions are for the HughesNet System Control
The System Control address should be: http://192.168.0.1
click the i at the top of the System Control page
then on Advanced Configuration and Statistics click Web Acceleration click Control check Disable Web Acceleration then click Submit.
Close and restart your browser.