This wasn't an oversight. Director Bong Joon-ho was famously vocal about his preference for audiences to experience Parasite in its original language. When he won the Golden Globe for Best Foreign Language Film, he gave a speech that became iconic:
Frequently streams Parasite with multiple audio options. Hulu: Offers high-quality streaming of the film. Parasite Movie English Audio Track Download
Unofficial sites are hotspots for viruses and spyware. This wasn't an oversight
At best, a downloadable English track might be an unofficial, low-quality "fandub" recorded by amateurs, or a robotic, AI-translated voiceover that completely ruins the movie's tension and emotion. How to Watch Parasite with Maximum Accessibility Hulu: Offers high-quality streaming of the film
The nuances of the Kim family's struggle in a semi-basement and the tense dialogue with the wealthy Park family are best captured in their original language.