There’s a reason you don’t see really good turkey conversationalists who avoid oral conversations. While it is possible to cover your turkey’s vocabulary with signs and box phrases, the diaphragm call is the best option if you want to say something with some attitude.
This is often the difference between sitting in the woods with your fingers crossed and getting birds into range. This is also something that doesn’t come naturally to most people because they don’t understand what they are actually telling the birds.