Here is a list of 15 different foreign films released during the Golden Age of Psychedelia, all of which have psychedelic elements. For variety's sake, I only listed one film per year and tried to find examples from different directors so that my list wasn't overwhelmed with just one director's work.
My definition of a foreign film is one that either is not in English or is made outside of the traditional outlets for film production (IE, no American or British films).
In chronological order, here is my list:
1960: Breathless (Jean-Luc Godard)
1961: Last Year at Marienbad (Alan Resnais)
1962: The Exterminating Angel (Luis Bunuel)
1963: The Leopard (Luchino Visconti)
1964: Red Desert (Michaelangelo Antonioni)
1965: The Tenth Victim (Elio Petri)
1966: Persona (Ingmar Bergman)
1967: Le Samourai (Jean-Pierre Melville)
1968: Danger: Diabolik (Mario Bava)
1969: Satyricon (Federico Fellini)
1970: El Topo (Alejandro Jodarowsky)
1971: Duck, You Sucker! (Sergio Leone)
1972: Aguirre, the Wrath of God (Werner Herzog)
1973: I Will Walk Like a Crazy Horse (Fernando Arribal)
1974: Sweet Movie (Dusan Makavejev)
1975: Salo, or the 120 Days of Sodom (Pier Paolo Pasolini)
Psychedelia was not limited to American and British culture, it was an influence throughout the world, a flowering of possibilities that bloomed in unlikely places. In future essays, I'll be unpacking these 15 and more lists should be in the pipeline as well. I need to compile a similar list for Hollywood films.