The Screen Reader is a feature that "speaks" to the user verbally by notifying them of settings and navigation.
If you are seeing "words on the screen", then you are either seeing Closed Captioning or Subtitles. This nomenclature setting is used interchangeably in different channels/apps so you may have to adjust settings in both the Roku Settings and from within your selected channel/app.
To turn off Closed Captioning/Subtitles from within Roku, go to Settings/Accessibility/Captions Mode /[Off].
Whenever watching content, you can toggle/bring up the Accessibility menu by pressing the * button (Options button), and look for Closed Captioning.
You may also have to further look into the channel/app options or settings menu you are watching as sometimes they do or do not override Roku settings and look for either Closed Captioning or Subtitles.
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