It's sometimes called "top binding". Here's an Epson manual:

"When Portrait is selected as the Orientation setting on the Main menu, the Left or Right binding positions are available. The Top binding position is available when Landscape is selected as the Orientation setting. "
https://files.support.epson.com/htmldocs/cx66__/cx66__rf/var...

And you'll find plenty more examples of "top binding" if you look. On the other hand, it's not clear that "top binding " is really a proper printing term. This forum post puts it in doubt, and uses the term "calendar format":

"G—the text block is rotated and it is bound on the left side, the long edge called by CS “the top" or "top edge," which is "what printers call it . . . for what printers call ‘top binding.’”
H—this is often called calendar format, here is the effect, right reading, shown with spiral binding"
https://forums.createspace.com/en/community/message/124340?t...

"Book or calendar format is simply related to long or short side binding, depending on whether the document is in portrait of landscape orientation. The most common format is portrait orientation, long side bound, which is a form of book format. If the short side is bound (still in portrait, ie. the top is bound) then it's calendar format. In landscape orientation, it's the other way around, long side bound means calendar format, short side means book."
http://www.wikihow.com/Print-Double-Sided-Documents-on-Any-P...

So I think either could be used.

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Note added at 56 mins (2016-01-28 15:32:04 GMT)
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Sorry, I was taking the meaning of the French term for granted, since you defined it in the question:

"Format à l’allemande
A l’allemande qualifie le format d’un document dont les pages s’ouvrent de bas en haut (type calendrier)."
http://www.panoply.fr/lexique/format-lallemande