Well not 100% sure how talkative Ogryns are. Im into 30k for the most part, or as of now. Still finishing Horus Heresy. There were some Ogryns in the Books so far, but not many. No i think only two occasions so far. One of them was the Book with John Grammaticus.
But still, this is not a standard Ogryn, hes a Bone’Ead so hes capable of whole phrases. Also they are very loyal and im wondering already who has his Loyalty on the Heroes side. Probably the standard Guard since it is more likely for them to fight with Ogryns than a Stormtrooper or Psyker. I reckon Ogryns freak out when they see Psykers. But still Bone’eads have implants to make em more Intelligent. So you could tell em to shut up. But they dont talk that much anyways i reckon XD
If they do talk, its more like the Hulk; "Hulk Smash, Hulk throw, Hulk… XD