Turning on captions/subtitles on Roku
To turn captions ON from the Roku home screen:
Select “Settings”
Select “Accessibility” (If Accessibility is not listed, select “Captions”) to access the captions menu
Select “Captions Mode”
Select “On Always”
Once you've done this, captions will show up for any Acorn TV show that has them available.
To turn captions ON if you are already watching a show:
Click the asterisk (*) button of your remote
Select the “Captions Mode” menu
Select “On always”
For more information on captions on Roku, please visit Roku Support's closed captioning page.