My language is set to japanese how do i change it back to english
Here is the fast way. https://www.duolingo.com/course/es/en/Learn-Spanish-Online (Originally accessed through the flag button, "Add courses" at the bottom of the course choices. I recommend saving this to your favorites. Just click on the big button with white letters encircled by white.)
Here if you press the blue down arrow, you will see a drop down menu of all the languages Duolingo offers in all the base languages.: https://www.duolingo.com/settings/direction You can choose one by clicking on it and then you must click on the green button above to "Save changes" (written in the base language you happen to be in, but always green).