I don't know why you say that, Runrig Fan. Jimmy Crowley and the Wolfe Tones both recorded Irish language versions of the song. There are a lot of versions of Níl 'na Lá in Irish. I only know of one in English, "There's the Day",as recorded by Cathal McConnell (I think he composed the singable translation), Kevin Mitchell and Daoirí Farrell. It is posted elsewhere on Mudcat. The tune used is a slow one, the same tune that Brian O hEara sings on the recording cited a few posts up by Runrig Fan. It's also the first tune I learned the Irish lyrics to although I also heard Clannad's fast version around the same time.