 Three Spanish-language Charlie Chan films were made in the 1930s and 1950s. The first, Eran Trece (There Were Thirteen) (1931), is a Spanish-language version of Charlie Chan Carries On (1931). The two films were made concurrently and followed the same production schedule, with each scene filmed twice the same day, once in English and then in Spanish. The film followed essentially the same script as the Anglophonic version, with minor additions such as brief songs and skits and some changes to characters' names (for example, the character Elmer Benbow was renamed Frank Benbow). A Cuban production, La Serpiente Roja (The Red Snake), followed in 1937. In 1955, Producciones Cub-Mex produced a Mexican version of Charlie Chan called El Monstruo en la Sombra (Monster in the Shadow), starring Orlando Rodriguez as "Chan Li Po" (Charlie Chan in the original script). The film was inspired by La Serpiente Roja as well as the American Warner Oland films.
