I have finally figured out a way to poorly and incorrectly mispronounce "dólares" so that it would finally let me through the exercises that include numbers and money. There is no single word it has struggled to understand more than that one. And trust me, I am saying it correctly. Good grief!
What about you? What words does Duo refuse to accept from you?
Here I thought it accepts everything.
No matter how I mumble the words it seems to accept it (learning german with english).
I have often thought the same thing actually. I'll speak really quickly expecting it to fault me, and then it accepts it... It does that for most verbal responses. But say the one word it doesn't like and it's like the application will do everything in its power to never accept my pronunciation.