I've found this one about death, (though it isn't at all what Andara is looking for). Is it traditional or is just another made-up one, pretending that it is ? It's about the kind of wood that would be chosen for your coffin and for those of your descendants.

Péine dhuit féin
Fuinseog dod mhac
Dair do mhac do mhic.

Pine for yourself
Ash for your son
Oak for the son of your son.

- and this one - has it been invented for the tourists or not ?

Go dtuga Dia deoch duit
as an tobar nach dtránn

May God give you a drink
from the well that never goes dry.

The first is an American phrase forced into Gaelic and the second is a traditional Irish phrase.

Go raibh maith agat.