Silly Wizards recorded a mostly English version, here are the lyrics as I found them:

FHEAR A BHATA (THE BOATMAN)

How often haunting the highest hilltop
I scan the ocean, a sail to see
Will it come tonight, love, will it come tomorrow
Or ever come, love, to comfort me

Chorus
A fhir an bháta, is na hó-ro eile
A fhir an bháta, is na hó-ro eile
A fhir an bháta, is na hó-ro eile
O fare thee well, love, where'er thou be

They call thee fickle, they call thee false one
And seek to change me but all in vain
Thou art my dream yet through the dark night
And every moment I watch the main

Chorus

There's not a hamlet, too well I know it,
Where you go wandering or stay awhile
But all its old folk you win with talking
And charm its maidens with song and smile

Chorus

Doth thou remember the promise made me,
A token plaid, a silken gown
That ring of gold with your hair and portrait
That gown and ring I will never own

Chorus