Irish orthography Irish orthography Irish orthography has evolved over many centuries, since Old Irish was first written down in the Latin alphabet in about the 8th century AD. Prior to that, Primitive Irish was written in Ogham. Irish orthography is mainly based on etymological considerations, although a spelling reform in the mid-20th century simplified the relationship between spelling and pronunciation somewhat. There are three dialects of spoken Irish: Ulster (now predominantly in County Donegal), Connacht (Counties Mayo and Galway), and Munster (Counties Kerry, Cork, and Waterford). Some spelling conventions are common to all the dialects, while others vary from dialect to dialect.
Cork–Limerick–Galway corridor closed for commercial traffic in 2016. Galway and Limerick are linked by the M18, and Limerick is linked to Cork by the N20. A motorway, the M20, is planned between Cork and Limerick. All three cities are connected to Dublin via motorway, Cork via the M8, Limerick via the M7 and Galway via the M6. The Western Rail Corridor links the three cities after recent major investment. The three cities are served by the Cork Suburban Rail, Limerick Suburban Rail and Galway Suburban Rail networks. Cork is served by Kent Station, Limerick by Colbert Station and Galway by Galway Station.