Hi there!! It's so nice to meet another person who's really into linguistics (I studied mostly French and Ancient Greek for my degree, but I love learning about it whenever I can). I've really enjoyed your la squadra where they're from series! I'm in the process of writing for jjba, and I'm wondering if there's any linguistic/cultural specifics to Napoli that you know about? I want to make the Zeppelis as true to life as possible lol
Neapolitan is one of the richest language I've ever heard
Hi there anon! Unfortunately, I'm not an expert on the historical evolution of Neapolitan. I was lucky enough to ask some Neapolitan speakers for a quality check on everything I wrote in my old posts.
However, since Steel Ball Run is set in 1890, I should look out for that specific diatopic and diachronic variation.
I'm going to ask my Sociolinguistic professor if there's some specific online corpus about Naepolitan in 1890, but to be honest I don't think there's such a thing.
What I can do for now is suggesting you a historical and very popular expression that originated in the 1800s and that Gyro would probably know:
"Mannaggia a Bubbà" (also known in the variations 'Mannaggia Bubbà' and 'Mannaggia beabà') is an historical Neapolitan exclamation.
Today this expression is no longer in use.
The literal translation of "Mannaggia a Bubbà" is "Damn you Bubbà" and refers to Bubbà, an infamous man who lived in the Neapolitan slums during the 19th century and was known to be involved in every shady business or situation. If something went wrong back then, people would confidently blame 'Bubbà', certain that he was somehow involved. In popular culture, 'Bubbà' worked as a 'scapegoat' and was cited on every unfavorable occasion.
Another thing I can do is translating one of the most iconic Gyro's line in current Neapolitan:
Gyro:"Rinc 'e ì a fancul, Johnny."
(Tell them to go eat shit, Johnny.)
Johnny: "Tell them yourself."
Gyro: "Ma vafancul strunz! Car ro cavall e spiezzt 'o cul!"
(Eat shit asshole! Fall off your horse and break your neck! )
Here are some books you can check:
"Dialetto Napoletano. Manuale di scrittura e di dizione" by Vitale Giovanni, Edizioni Scientifiche Italiane, 2009.
"Ortografia della lingua napoletana" by Carro Enzo, Youcanprint, 2017.