I have them in a UK book called the National Songbook. Used to be a must in schools, alas, jingoism triumphed over tradition and it was withdrawn. I can do them if you want, Pmail me your address and I can do them for you, unless you are likely to be at Llanstock, where I can give you a copy.....The words in Welsh are basically the proper ones in English,
soon the hoar old year will leave us..... etc. Fa la la la la is the same in Welsh as English....
LTS