CSV file not readable in excel

Hi!
I have an online form, and I set up a blank csv file to contain all submitions. My problem is that when I try to open the file in excel, it can't show letters like "űáőúó" the right way. It has the columns, and the text, but those letters are replaced with gibberish characters.
I think it must be some character coding problem, but I can't find the way to open it in excel, to see the submitions the way I supposed to.
I have a mac, and it works perfectly in the "Numbers" application, but I want to use the file in excel.
Thank you
I attached the file