When Marcello Hernández speaks, his voice takes ebullient leaps and bounds. He tells jokes with the same musical cadence of the Caribbean songs his parents raised him on; classics by Juan Luis Guerra, Celia Cruz and Tito El Bambino. “My dad is like a funny little Dominican guy and then my Cuban mom is this larger-than-life kind of figure,” explains the 28-year-old stand-up comic. “Watching them all be funny in their own little way was important to me,” he adds. In his 2026 Netflix stand-up comedy special, “American Boy,” Hernández painted a riotous picture of his youth in Miami, where he grew up playing soccer and eventually starred in comedic videos for the city’s beloved social media page, Only in Dade. In 2022, he joined the cast of “Saturday Night Live,” weaving his excitable Spanglish flow into recurring sketches like “Domingo” (which co-starred Sabrina Carpenter) and his English-language spoof of the Latin American variety show “Sabado Gigante.” In sketches like “Protective Mom” — partly inspired by his own aggressively doting mother — he’s tag teamed …