If you own the series on physical media or digital files and need external .srt files, these community-driven sites are the primary sources for Hungarian translations:
Subtitles "Buffy the Vampire Slayer" The Prom - subtitles english 1CD srt (eng) Open Subtitles Downloader Buffy the Vampire Slayer subtitles English S03E20 Buffy the Vampire Slayer subtitles Hungarian S0...
If they don't load automatically, simply drag and drop the .srt file into the player window while the video is running. Quick Season Overview: Season 1: 12 episodes Seasons 2–7: 22 episodes per season Buffy the Vampire Slayer subtitles English S03E20 If you own the series on physical media