My translation: "You will understand nothing if you don't listen," should be accepted.
It rejected the very similar "you will understand nothing if you do not listen". Reported 26 July 2020. This whole skill is very buggy.
reported again 13/8/20
I agree: You will understand nothing if you do not listen. is correct and should be accepted.
"You won't understand" was not accepted for "You will not understand", anyone else had this error?
Shouldn't it also be future tense? The present tense in english would be "you don't understand anything if you don't listen."
Why is this future tense instead of conditional if it is an if..then statement
The future is conditional by its very nature, there is no such thing as a future conditional tense.