Should also be "The tradition is new in Germany". Rarely would "young" be used in this context.
It's not just English. The 5 different languages which I happen to know, they all have two different words for young creatures and new things and they all use one single word for old creatures or things. It's actually strange that languages don't differenciate the old living creatures and the old lifeless items. It looks like in the past times the old creatures were considered as things and not living any more or the old things were considered to become alive with their own soul.