"air-in go bra" Another Answer:. Éirinn go brách is the actual Irish (Gaelic) spelling and would sound something like "aer-in guh brawkh" a gutteral sound at the end.
Both. The original phrase in Irish isÉirinn go bráchFor English speakers this was respelledErin go bragh or Erin go braugh.
Original Irish (Gaelic): Éirinn go brách
Irish (Gaelic):Éirinn go brách (aer'-rin guh brawch)Scottish Gaelic: ...
It means 'Ireland forever' but I don't think it was originated by St. Patrick.