And further re Welsh/English:
When I married my first wife in an Anglican/Church of England parish church in her home village we had to choose the music that the organist played while my wife and I, marriage witnesses and the vicar, signed the marriage register (just a few minutes).
My wife and I agreed on a romantic Welsh tune.
Unfortunately or not the organist misunderstood and played the hymn on the opposite page of her book.
It was not, however, inappropriate to celebrate the forthcoming wedding night.
The title in Welsh was 'Ar Hyd Y Nos' - 'All Through The Night'!