Kenneth "Kenny" McCormick is one of the four main characters in the animated television series South Park, along with Stan Marsh, Kyle Broflovski, and Eric Cartman. His often muffled and incomprehensible speech – the result of his parka hood covering his mouth – is provided by co-creator Matt Stone.

Why does Kenny talk muffled?

Though he isn't wearing his signature hood, his voice is still muffled due to the mask, but he does speak some Spanish. After all, he is meant to be a Mexican luchador. Then there's the fourth season episode “Quintuplets 2000,” where Kenny speaks a bit of Romanian when he becomes a huge opera star in Romania.

Does Kenny actually talk?

His unique muffled voice is accomplished by his voice actor Matt Stone, speaking into his cupped hand. He speaks clearly and without his hood in South Park: Bigger, Longer & Uncut, "The Jeffersons", "Lice Capades", and "Mysterion Rises" with proper, unmuffled lines.