Mian - Sang this last year in English because I wanted the listeners to understand the words. I think I learned it from an Altan CD, one of the more recent ones. This is basically their translation adapted by me to fit the tune better:

I went to the market and traded my cow
For five pounds in money and a gold guinea coin
If I drank all the money and the gold I gave away
Since its no-one's concern then no-one should care
If I drank all the money and the gold I gave away
O caide sin do'n te sin nach mbaineann sin do

If I go to the woods gathering berries and flow'rs
Picking apples from bowers and herding the cows
If I lie in the shade for an hour or more
Since it's no-one's concern then no-one should care
If I lie in the shade for an hour or more
O caide sin do'n te sin nach mbaineann sin do

If I go to ceilies to dance and to sport
To market, to races, and things of that sort
If I see people merry and their merriment I share
Since it's no-one's concern then no-one should care
If I see people merry and their merriment I share
O caide sin do'n te sin nach mbaineann sin do

People are saying I'm a cad gone astray
With no gold, no possessions, no cow and no cares
If it's my own desire to live this way
Since it's no-one's concern then no-one should care
If it's my own desire to live this way
O caide sin do'n te sin nach mbaineann sin do