In the Myrna Loy clip, it sure sounds like she says the “f” word, but there is no way any of the state and regional censors would had let that pass, let alone the SRC. I’m pretty sure she’s saying “Russian swine,” as he was the legionnaire in the group from Russia, and they’d had words previously in the film.
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Pre-Code Hollywood – An era in American film history between the introduction of sound in movies (1929) and the enforcement of the Motion Picture Production Code (commonly known as the Hays Code) in 1934. During this period, filmmakers had more freedom to explore controversial and explicit themes in their films
Pre-Code Hollywood Classic Clips