Good day/Hello : Dia duit. (jeea ditch)
Reply to good day : Dia's Muire duit. (jeeass mwirra ditch)
Good night : Oíche mhatih (eeha wah)
Good bye (if you are staying) : Slán leat. (slawn lyat)
Good bye (if you are leaving) : Slán agat. (slawn ugut)
Good morning! : Dia dhuit ar maindin!
Good evening! : Trathnóna maith duit!
Good night! (Nighty night!): Oíche mhaith agat!, Slán codlata agat!, Codladh sámh!

Goodbye! : Slán!

How are you? (Munster) : Conas tá tú? (kunas taw too)
How are you? (Ulster) : Cad é mar até tú? (kajay mara ta too)
How are you? (Connaught) : Cé n chaoi a bhfuil tú? (keng khee awill too)
I'm fine, thanks. : Tá go maith, go raibh a maith agat. (taw gu mah, gura mah ugut)
Sorry! : Gabh mo leith scéal!
Sorry? : Gabh mo leith scéal!

Cheers! - Sláinte! (slenjevah!)
Merry Christmas! - Nollaig Shona!
Happy Birthday! - Go maire tú an lá!