the www.tyghet-da.u-net.com/galan.htm does give the popular words used in Welsh to the harp tune Nos Galan but please note that they aren't a direct translation! By the way, I have had long discussions on *Deck the Halls* with Welsh experts who have researched the song in the States, and it may well be that words, *Deck the Halls...* were written by a Welsh American. It certainly was published over there much early than over here in Wales. Nos Galan, as a tune, is/was popular both as a dance tune for harp (hence the evolution of the ffa-la-la's) and as a tune for setting penillion - singing a variety of verses as suited the occasion.