This is the very rare Spanish language version of the lost original Charlie Chan film, "Charlie Chan Carries On". I believe that there is not a version that has English subtitles as I viewed the film with the help of a detailed synopsis I found in Cult Movies magazine #27.
The film has entirely different actors and a different crew from the American film, which was shot 7 months earlier. In fact, it was released after "The Black Camel" came out - the 2nd Warner Oland Chan film.
Eran Trece is an interesting film, though. It is particularly interesting to watch Manuel Arbo portray Chan in a very impish way, more physical than Oland or Toler. He moves around quite a bit in his limited screen time (Chan appears half way through the movie). He is very charming in his own original way and his tone is also warm. It's worth noting that at this time detectives in films were hard-boiled and/or intellectual and Chan, even in this early form stands out as very polite, and hard-working. Arbo gives a different take than Oland, but he is still very much Chan throughout.
As for the plot, it is complicated and without subtitles very difficult to follow the details. I was grateful to have the long synopsis, but if anyone is interested they should read the novel "Charlie Chan Carries On" by Earl Derr Biggers, or watch the remake with Sidney Toler, "Charlie Chan's Murder Cruise". All in all, Eran Trece is a worthy Chan film.