The word 'belino' is not common in french cuisine.
Related to food, it appears twice: in the south west and in the south east, which could indicate either Italian or Spanish influence.
Beware though, in Italian slang it means 'cock' or 'dick'! (
https://www.urbandictionary.com/define.php?term=belino)I've sent a request to the butcher of the restaurant
http://www.pizzeriachezjeannot.com/adresse-horaires-pizzeria... to understand where it comes from.
Meanwhile, I would keep the term 'belino' as is, ie. untranslated.