Samba Celtic, a Brazilian side play in the lower divisions of the Galway & District League. They're based in Gort, the Rio of south Galway.
Killtullagh Pioneers play in Division 2a of the same league. They were a Premier Division side until a couple of years ago. They're anything but Pioneers hence their slide but they were at one point in the past...
When I played in Dublin, a few seasons ago, we played against an Italian side, Del Pino, based around the Parliament St. restaurant of the same name. Not sure if they're still going. Churches League I think.
Probably the best name I've heard in recent years in the Ballyvarry Blue Bombers who play in the Mayo League. All from Mayo I presume. :D