most confusing; why is it when translating from Italian to English Prego is hello (Prego, buongiorno)
when translating English to Italian it is marked wrong?????
Since this post is about Italian, could you move it to the Italian forum? More of the people who are interested in Italian will see it there, and it will help keep this forum easy to navigate for those who aren't currently studying Italian.
Don't delete it and create a new one, just click edit, and change the topic from Duolingo to Italian. Here's a guide on how to move a post: https://www.duolingo.com/comment/16609773.
Prego doesn't mean hello, in response to grazie it means you're welcome and in response to a question it means of course.
I think in your example it would mean something like I bid you a good morning. Of course it's a very long time since I studied Italian, so I'm not 100% sure about that one. I think the confusion is that, unlike Spanish, Italian doesn't exactly have a translation for hello so you need to translate greetings into equivalents (like ciao, or Buon Giorno, or (on the phone) Pronto). Doesn't duo cover this in the notes?