In reply to:

creche/Nativity Scene

Agreed the word creche is not only not used, but is not generally considered an English word in the USA. "Nativity Scene", in my experience, is generally used only to refer to a large (maybe life-sized) display, as on a village green, in front of the courthouse, or possibly on one's front lawn (garden, to Brits); the first two are now, in most communities, forbidden on public property as violating the separation of church and state. A small scene (I have a fine one bought 37 years ago in Italy -- it is on my mantel in the living room at Christmastide) is generally called a manger, an example of use of the part for the whole.