For purists, the official DVD release includes English subtitles. Check eBay or Amazon for the "International Edition" which explicitly lists subtitles on the cover.
Given that Zee Telefilms was a key producer, Zee5 is a reliable source. Kaho Naa Pyaar Hai Movie With English Subtitles
One of the main reasons the search for Kaho Naa Pyaar Hai movie with English subtitles is so high is academic. Film schools in the UK and US study this film for its "dual role" dynamic. The subtitles expose the meta-humor. When Raj initially rejects Sonia because he doesn't want to be a "replacement," the subtitle translates his sarcasm perfectly, highlighting how the film comments on its own absurd premise. Kaho Naa Pyaar Hai Movie With English Subtitles:
Raj and Sonia's love story is a beautiful and emotional journey that explores the complexities of love, family, and relationships. Subtitle Quality: Excellent