With Yule/Xmas coming along at full throttle, I thought this might be the year I'd actually figure out how to sing Deck the Halls in Welsh. Any Mudcatters know:
1) The Welsh text, if any, underlying the customary English "Deck the Halls" (e.g. the one in the Digitrad that is not a parody)?
2) The Welsh text underlying what the Oxford Book of Carols gives as "All ye mountains, praise the Lord"?
3) Other Welsh texts for the tune (Nos Galan)? Preferably with English glosses, as my Welsh is minimal.

Liland

PS I tried putting Nos Galan in the Digitrad Search box with no results.