I haven’t been there in a long time but my recollection is that it is a smallish airport, not hard to get around at all when compared to mammoths like Frankfurt, Vienna and Zurich. I happen to read Italian but I didn’t need to when I was in the airport.
Things there are probably very expensive; if you’re on a tight budget best that she has food with her so that she does not even have to buy fruit or a coke in the airport. If she wants to bring someone a gift, no sense buying it in any European duty free; no savings over US regular price or EY duty free.
Chabad in Rome is now very well-staffed. Alitalia does stand for Always Late In Takeoff Always Late In Arrival so if a flight is cancelled and she needs to go into Rome itself the shluchim should be able to help her (in English and Ivrit – I know who they are and each of them speaks one, the other or both fluently because of where they or their parents are from originally.)