Three Spanish-language Charlie Chan films were
made in the 1930s and 1950s. The first of these, 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 being filmed twice the same day, once in English and once in Spanish. The film followed essentially the same script as the English-language version, with minor additions such as short songs
and skits and some changes to characters' names (for example, the character Elmer Benbow was re-named Frank Benbow). A Cuban production, La Serpiente Roja, followed in 1937. In 1955, Producciones Cub-Mex produced a Mexican version of Charlie Chan called El Monstruo en la Sombra, 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.