Near the beginning of the film, a little girl can be spotted waving from the deck of the steamer as it is about to leave. Ten years later, the little girl can again be spotted waving from the steamer near the end of the film.
There are two scenes in the film where currency is shown. The notes are visibly the wrong size to be US currency. As further visual confirmation that this cannot be US currency, the notes vary in size by denomination. The film is set in Puerto Rico, which is a US territory and has used US dollars as currency exclusively since 1913.
Dr. Gomez is supposed to be from Brazil. Using the Spanish surname "Gomez" would be an extremely odd choice for someone from a Portuguese-speaking country, such as Brazil, since the Portuguese version of the name is "Gomes". It's never shown in written form in the film and any difference in pronunciation would not realistically be detectable in the spoken German dialogue; however, the Spanish version of the name is used in the original film credits and propagated to the English language film credits and subtitles.