How do you wish someone well in ireland?

Answer 1

Of course English is the predominant language in Ireland, but if you want to

wish someone well in the Irish language, it would be:

Tá dea-mhéin agam duit or Tá dea-mhéin agam daoibh.

The first sentence is addressing one person; the second, more than one.

Answer 2

Go raibh maith agat agus go n-éirí an t-ádh leat

if speaking to two or more people make the following changes

agat -> agaibh

leat -> libh