Are there any VMS-type hoaxes?

[ololololo]

First I would say things like Codex Seraphinianus aren't hoaxes because the author, Luigi Serafini, from the very beginning openly claimed that the text is meaningless. So it is an artistic project, not supposed to deceive anyone.

Well, in general, it has more to do with VMS, because it practically fits the description - a mysterious (at first glance) book written in an unknown language and containing incomprehensible illustrations. After all, Serafini was inspired by the VMS...
But, @Rafal, apart from the Book of Veles, your examples surprised me, and I didn't know about them before. But they all parody other languages or rely on some well-known controversial idea (Slavic neo-paganism, Vikings and America, etc.). 
The idea of VMS is unclear in this case. It looks like a medical guide that provides information about herbs, astrology, recipes, etc. And it doesn't seem to be a "hack job".
If the author had enough knowledge to draw such illustrations, why didn't he write a regular herbal?

The two You are not allowed to view links. Register or Login to view. by Dee and Kelley. The first language was presented in tabular form, and Dee was likely inspired by Soyga (of which he owned a copy which greatly puzzled him). The second language comes with an English translation, but the general consensus is that the English cannot correspond to the original, which could be a meaningless pseudo-language.

All such pseudo-languages are a posteriori, but Voynichese, if it is a hoax, is most likely a priori, and is completely meaningless and simple.