If you want to get subtitles on the WatchLOI content you are watching, you can enable subtitles in your device settings.
To turn on subtitles on a Windows PC / Laptop - https://support.microsoft.com/en-us/topic/closed-captions-in-movies-tv-content-on-windows-10-41f4668d-23c4-2194-3c33-43698ea6164a
To turn on subtitles on Apple devices go to Settings > Accessibility > Subtitles & Captioning. If you prefer closed captioning or subtitles for the deaf and hard of hearing when available, turn on Closed Captions + SDH. For more information see: https://support.apple.com/en-ie/guide/iphone/iph3e2e23d1/ios#:~:text=Go%20to%20Settings%20%3E%20Accessibility%20%3E%20Subtitles,turn%20on%20Closed%20Captions%20%2B%20SDH.