Seachtain na Gaeilge has even won support from an astronaut this year.
Born-again Irishman, Commander Chris Hadfield, features on a video promoting the events.
He says: 'Is leatsa í, mar sin úsáid í' ('It's yours, use it.')
Last year, Commander Hadfield put Ireland on the map with the first tweet from space as Gaeilge: "Tá Éire fíorálainn" (Ireland is beautiful).
Thousands of events have been organised, including Saturday's national opening in Killarney, a street festival with a free concert, and Rith 2014 – a national relay run from Cork to Belfast.
On Saturday there will be a match at Somerton GAA pitch in Dublin between Ciarán Kilkenny's club, Castleknock and the Irish-speaking club Na Gaeil Óga.