There is a great Gaelic dictionary
here. Not only good for translating the rants of fellow Irish Gaians, but I'e also found you can annoy the life out of everybody else in GD, my beloved ED, or newbs in the Welcome to Gaia forum. It's fun to watch them wonder what you said and say "WTF does that mean?". Just sit back and laugh while they try to translate something like... "Ahh... the power of cheese." for 20 minutes. But anyway, great reference tool.