Quite frankly, I'm not sure what to make of it. I seem to recognize the term "sylph" from it, which refers to an air spirit. If that's the case, whoever guessed Flying (or Normal/Flying, depends) would be right. The word "nymph", which could be found in Ninfia, is also present in the French name.
Regardless, it seems that they're serious with these worldwide announcements, right down to non-starters, non-legendaries.
Now watch. Since we usually get Eeveelutions in pairs, we're going to get a Ground-type (as an opposite of Flying) called Gnomeon, named after "gnome", the earth elemental. Of course this is just wild speculation and isn't even worth calling a rumor, but I'm writing this down just in case I turn out to be right.