If you are downloading the film (where legality allows personal backups), search for the file name ending in WEB-DL.EN-SUBS . Avoid files labeled EN-DUB .
: While the marketing leans heavily on these being "true stories," many viewers and critics consider the "based on true events" label a cinematic technique to heighten fear (often called "cinplotasyon" in Turkey). How to Watch with English Subtitles
You can find the movie with official subtitles on several major platforms:
Many free versions offer poor English dubbing, which . Dubbed audio: