Most "Dual-Audio" releases of classic European cinema from this era typically feature the audio alongside a secondary language dub, often Spanish (due to the film's setting in Spain) or French .
Go to and select "Track 2" or the specific language you prefer. 10-30 P.M. Summer (1966) Dual-Audio
The Internet Archive often hosts public domain or rare films where you can check for different audio streams. Most "Dual-Audio" releases of classic European cinema from