Wellness vacation international
There are various associations within Germany, who have taken up the cause of “wellness holidays” and hope in this way, to ensure a high standard of quality for hotels and establishments of this type within our country. So it's relatively easy here, find a reliable, quality hotel, if you stick to such objective characteristics.
However, if you intend to, to integrate one or the other wellness treatment into an international holiday, this may make it more difficult.
On the one hand, the term "wellness" is not yet known all over the world, so, of course, in different countries you will simply have difficulties, even just to find a hotel, that identifies with the term. German tour operators are of course aware of this, To convey wellness holidays all over the world, but one cannot assume that in every country, that a suitable hotel or offer can be found.
Nevertheless, there are now enough renowned providers in Germany, who also or currently have wellness trips in their program, so it shouldn't normally be too much of a problem, to integrate some care for body and soul into the holiday plan of a year.