In the Incredible Hulk comic books of my youth, the Hulk could speak.
In the late '70s, Lou Ferrigno, a bodybuilder who couldn't speak very well because he was deaf, played the Hulk on television. This Hulk couldn't talk, so all they required of Ferrigno was his bitchin' bod.
Years later, they made an Incredible Hulk tv cartoon where the Hulk DID speak. They cast Ferrigno to do his voice.