The simplest way is to use a streaming service that already includes the option.
Believe it or not, Rajshri Productions (the studio) often uploads the full movie on YouTube. While the default subs are English, you can turn on Auto-translate to French. Warning: Auto-translate isn't perfect, but it captures about 80% of the meaning. 3 idiots french subtitles
While it is legal in most places to download subtitles for a movie you have legally purchased, using them with pirated copies is a violation of copyright. It's always best to practice ethical media consumption. The simplest way is to use a streaming
The film is accessible on Amazon Prime Video , though the availability of specific language tracks can fluctuate depending on your country (e.g., France vs. Canada). Warning: Auto-translate isn't perfect, but it captures about
While the setting is uniquely Indian, the themes are intensely universal: