From the longer Wikipedia page [1].

Fakelore or pseudo-folklore is inauthentic, manufactured folklore presented as if it were genuinely traditional. Over the last several decades the term has generally fallen out of favor in the academic study of folklore because it places an unnecessary emphasis on origin (instead of ongoing practice) to determine authenticity. The term can refer to new stories or songs made up, or to folklore that is reworked and modified for modern tastes. The element of misrepresentation is central; artists who draw on traditional stories in their work are not producing fakelore unless they claim that their creations are real folklore

The term fakelore was coined in 1950 by American folklorist Richard M. Dorson.

Folklorismus, Anglicized to folklorism, also refers to the invention or adaptation of folklore.

The Wikipedia fakelore category is at [2]