I've been thinking the same thing but if you see here there is a difference. Luggage is all the things you take on a journey. (Think backpacks, cardboard boxes, book bags... whereas a suitcase is one item in a particular shape.) Here's an interesting link: http://www.differencebetween.com/difference-between-luggage-and-vs-suitcase/
Should you not allow "bag", at airports it's always "bag check" etc. Not suitcase.
Yes, very good observation and addition to the course. I've added "bag" as an alternative translation. Many thanks.
Thank you. You've made me rethink my previous comment. Since the Greek specifically says βαλίτσαthat refers to "suitcase" not "luggage (αποσκευές ) where we might have "bags, backpacks etc".
Many thanks for your help.