Hi @mlpolifka,
Greetings from the Roku Community!
We're glad to assist you with setting up the subtitles on your Roku device automatically. Please be advised that closed captions are available only when the service provider (e.g., Netflix, The Roku Channel, or Hulu) includes them with their content. Check with the service provider for information about the availability of closed captions. You can also check out this support article on how to enable closed captioning for additional information.
We hope this helps.
Kind regards,
Eunice
Eunice L.
Roku Community Moderator