During my research into The Zozo Phenomenon, my studies often involve digging into areas in other languages.
In 1998 a professor of Asian studies named Phillip Sagante published this 155 page study of pre Zen Budhist Tibet.
It contained an ancient Tibetan prophesy written in the 8th Century.
Here is a screenshot of the prophesy written in French
Here is that same opening to the prophesy translated into english.
The Ninth Circle
Ancient Tibetan Prophesy
At the time of the kings of Yarlung, the time which passes is conceived in a
cyclic form. It is not linear as is believed today in the West, it is discontinuous.
Humanity passes successively ages of different kinds, and these ages of very
long duration seem to be numbered in tens of thousands of years.There is
first the time of origins, a kind of golden age. It is the epoch that follows the
creation of the world by the gods.It is located in a past pass, a happy pass,
pomp, prosper. Men and gods are not separated. Beings and all that will
populate the earth are concentrated in heaven; They descend in turn,
beginning with King Nyatri Tsenpo, founder of the Yarlung dynasty. A
thousand legends, like that of the yak and the horse, tell how the earth is
peopled with beings from heaven. This age of origin lasts ten thousand years
and ends under the reign of the thirteenth king of the Yarlung dynasty. The age
of the declines then appears.
The circumstances which put an end to the age of origin are very peculiar.
Until then, the lord of the demons, a man named Zozo, was enclosed in the
ninth storey under the ground, inside nine citadels of copper.
He is unhappily released by the drongzhile king, the thirteenth king of Yarlung.
The king himself is attained in his power; Two elements that protect his
person - we do not know if it is objects, animals or even gods - abandon his
body to go up to heaven. Then begins the age of declines. An evil religion
reaches the land of men. The power of Zozo and all the demons becomes
stronger.
Humanity then passes from a bad epoch to another, even worse; Declines
succeed and situations get worse. The gods, little by little, abandon men to
ascend to heaven; the mountains of the country are emptied of their presence;
The demons extend theirs.
This is by. far the oldest mentioning of Zozo being demonic that i have located in the last decade of research.