OOTP Mods - Rosters, Photos, and Quick-Starts - OOTP Developments Forums
If you run a search in that forum and search by posts for Italian or Italy or Dutch, there is a league someone created for each of those for OOTP15 recently I know because I downloaded them.
Also check OOTPMODS.com, but that forum specifically has the posts I just can't find it now and don't have the time to search for you, but...seriously, they are in there.