Based on the lack of provided information about 'Paco apprend à nager,' no identifiable LGBTQ+ characters or themes could be assessed. Therefore, the film's portrayal of LGBTQ+ elements is considered N/A, as no depiction was evident from the input.

The provided information for 'At Piedigrotta' does not contain any details regarding transsexual characters or themes. Consequently, an evaluation of its portrayal in this specific area cannot be conducted, resulting in an N/A classification due to a lack of depiction.

The movie does not contain any action or adventure elements.

As an original film from 1921, there is no prior source material, established canon, or historical figures associated with "Paco apprend à nager" to determine if any characters were gender-swapped from a previous portrayal.

There is no widely known source material, established characters, or historical figures associated with the 1921 film "Paco apprend à nager" that would define a character's race prior to its production. Therefore, no instance of a race swap can be identified.