Wenn es sich um die Kunstrichtung handelt, bleibt es unübersetzt.

google hits : fluxus meaning :
https://www.google.com/search?q=fluxus+meanin...

"fluxus" sollte mE weder unkommentiert, noch ohne Eintrag bleiben, obwohl es sich "nur" um eine "Kunstrichtung" handelt.
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https://en.wikipedia.org/wiki/Fluxus
"Fluxus was an international, interdisciplinary community of artists, composers, designers and poets during the 1960s and 1970s who engaged in experimental art performances which emphasized the artistic process over the finished product.[1][2] Fluxus is known for experimental contributions to different artistic media and disciplines and for generating new art forms. These art forms include intermedia, a term coined by Fluxus artist Dick Higgins;[3][4][5][6] conceptual art, first developed by Henry Flynt,[7][8] an artist contentiously associated with Fluxus; and video art, first pioneered by Nam June Paik and Wolf Vostell.[9][10][11] Dutch gallerist and art critic Harry Ruhé [nl] describes Fluxus as "the most radical and experimental art movement of the sixties".[12][13] [ ... ]
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FLUXUS is ( hopefully ) still alive ! ;-)

"Im Fluxus kommt es dabei nicht nur auf das Kunstwerk an, sondern auch auf die schöpferische Idee."
... ... mittlerweile pervertiert und integriert in die kapitalistische Verwertungsmaschinerie ... aber nichtsdestotrotz in seiner Reinform letztlich nicht totzukriegen.
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IMO : Es gärt gewaltig ... ;-)