A nationally adapted open source license is all well and good - but what can it really achieve? Open source is unlikely to be restricted to national borders. And Germany is only a very small part of the world. In my view, it makes much more sense to analyze the existing licenses and work directly with the license holders (such as the FSF for the GPL) to ensure that these general international licenses have full validity everywhere possible.
At most, it would make sense to develop a license addendum that can be attached to the GPL to clarify national peculiarities. Because this way, the exact opposite of the GPL problem could occur: the license is valid in Germany, but not valid outside or only restricted. And that would certainly be just as fatal...
OK, one could do dual-licensing of projects, but then it must be ensured that the licenses don't contradict each other, and that regional restriction is even possible. DFSG, for example, does not allow discrimination by location - and thus a package that is under GPL for international use but under the Bremen License for national use in Germany would potentially no longer be DFSG-compatible.
The original article can be found at heise online news (here).