They're at:
I get those pages if I click on the donation banners on dsb.wikipedia.org and hsb.wikipedia.org -- you do not because you live in Germany, so you get redirected to the Wikimedia Deutschland donation page/website.
Casey is correct: the sole right to fundraiser in Germany resides with Wikimedia-de, and therefore the Wikimedia Foundation itself is not fundraising in Germany. Wikimedia-de is. I'm going to flag to them that there is this request for another language donation form, and also point out this thread. :)
pb