I don't have Magic on my machine but have worked with it. Has she checked out the "Set screen echo" command, INSERT+S to see if there might be something there that might work?
She could also toggle speech off entirely for the duration of the game if that is something that will work for her. Using MAGicKey+F3 will toggle between full speech or speech on demand and if the latter is selected speech is, for all practical intents and purposes, off unless you intentionally trigger it for a specific purpose.
Brian Version 1703, Build 15063.296, Home 64-bit
Many are under the gross misapprehension that the Constitution is a cage and a laundry-list rather than a framework upon which great things have been and still will be built. Many things that are entirely Constitutional are not "in the Constitution," but are allowed under it.