"When is your birthday?"
Translation:Kiedy masz urodziny?
Why does When is your birthday? use both mieć and być? Kiedy masz urodziny?, Kiedy są twoje urodziny? Other languages that I know use one or the other but not both.
Well, in Polish both are possible. I think the first one is more common, though.
It says the correct answer is "kiedy masz urodziny" but "masz" is not in the list of words....
The algorithm gives you one of the starred answers as the correct one, but clearly it's not necessarily the answer for which it gives words for...
The starred answers here are "Kiedy są twoje urodziny?" and "Kiedy masz urodziny?".
"Kiedy masz urodziny?" is one of the two starred answers, the other one is the more literal "Kiedy są twoje urodziny?". One of them surely could've been created.
You may see this topic: https://forum.duolingo.com/comment/27952965 and upload a screenshot if possible. Because I do agree that there is some problem.