One of the things I always love about Ireland is that the road signs are in both English and Irish. It often helps you figure out how the Irish pronounce the name of a town.
There are a couple of exceptions where the Irish for a place and the name of the place are different. Dublin - the capital city - is a great example. The name Dublin comes from the Irish Dub Lin (or black pool), but the Irish name for it is Áth Cliath.
At any rate, I love the weathered signs that you find around the country. It adds to the romance and charm of the Emerald Isle.