speaking of werewolves does Argentina have a werewolf legend? in Brasil the legend is that if a couple has 6 daughters and the 7th child is a boy, he will turn into a werewolf on his 13th birthday
NOT ONLY WE HAVE WEREWOLF LEGENDS, WE HAVE LEGAL PROTECTIONS AGAINST THEM
According to Argentine Law No. 20.8431, the President of the Nation becomes the godfather (or godmother) of the seventh male son or seventh female daughter of any Argentine, so that they don't become werewolves (lobizón) or witches.
This by the way, is a real law. It's still enforced today.
There are 11.000~ Argentine godchildren who are protected by the Argentine State from becoming werewolves.
This comes from a petition from Russian inmigrants who also had the same legend.
In Argentina, werewolves are called "lobizón" (plural, "lobizones") and traditionally they are related to the Guaraní legend of the Luisón, one of the cursed children of Tau and Keraná, which is also popular in Brazil. However, that legend has several modern retellings and it's difficult to access to its origin.
In fact, according to Luis Ambrosetti, the lobizón isn't a native legend on itself, but it comes from European Brazilian inmigrants who interacted with the criollo and native people of the region, including Argentina. For example, in Argentina, and I believe also Brazil, the Lobizón or Lobisome is associated with the Aguará Guazú or Lobo-Guará. This is not a connection found in the native peoples of the Americas, at least not in historical records, and it doesn't really fit the rather gentle and skittish nature of the Aguará Guazú.
In fact, the Tupi-Guaraní peoples, and most of the people from the Amazon to the Mata Atlántica to the Great Chaco if not the whole of the range of the jaguar, have therianthropic legends of Jaguar-men, most prominently in the Guaraní cultural sphere (Paraguay, Northern Argentina and Southern Brazil) the Yaguareté-Avá, sorcerers or madmen who could turn into jaguars. This was an incredibly common motif found all over the continent. It seems that this legend was syncretized with European tales of werewolves, thus transforming into the Lobizón, associated (rather infamously) with the Aguará Guazú as we know it today.
This is something that deserves careful reading and study, but if anyone has time, here is a fascinating read: