error in grading/translation
When Duolingo (app) makes an error in grading/translation, how to I report it?
Yes, very obvious. When you get an answer wrong, at the bottom left of the screen (under the correct translation), you will see two options: Report a Problem and Sentence Discussion. When you click Report a Problem, one of the options is "My answer should be selected". Just select that option and click submit. That's it!