Rita Hayworth later recalled that "I remember somebody asked the dialogue director what kind of accent we were supposed to simulate for our characters and he said, 'Standard Hollywood-Mexican-nobody will know the difference!' I guess maybe he was a better critic than dialogue coach since I don't believe too many people saw the picture."
First credited feature film role for Rita Hayworth, who had an uncredited part one year earlier, in Cruz Diablo (1934).
Rita Cansino's (Rita Hayworth's) part consisted of a few lines of dialogue exchanged with Warner Baxter and a dance, called the "Zamba," which she performed while ostensibly a waitress-entertainer in an Argentine café sequence.
In his "New York Times" review, Andre Sennwald wrote "Under the Pampas Moon" is so bad that after a while you stop resenting it and begin to be amused by its antique humors."