Yes, it’s Philly. Despite how much those of us outside the area might think we know it, “the characters in Rocky don’t talk like they’re from Philadelphia. Neither do the ones in Silver Linings Playbook or The Irishman. For all the stories that have been set in and around the city, there’s a pronounced lack of authenticity when it comes to speaking the way the locals do—not a matter of failed attempts, but a failure to attempt it at all.” – Slate
