Herbei, Oh Ihr Gläubigen (Adeste fideles) In German and if you go on clicking several other languages including French.And for Stille Nacht you'd really go to the Stille Nacht Webpage that has some 150 versions in more than 100 languages, among them all languages you have been asking for.
Minuit, Chrétiens in several languages
rabbitrunning, can you imagine that 'Kling, gloeckchen, klingelingeling' is a big favourite for parodies at the football stadiums?
In general, for christmas songs in other languages, start here.
Wolfgang