Subtitles, Closed Captions, and Open Captions: What's the Difference?
A lay of the land of the different kinds of synchronized transcription, featuring a creature with atom rays of superhuman strength.
Plain English is all about using clear language to make content easier to read and understand for everyone. But it's just one part of making accessible websites.
If you work in content and want to get a better grip on web accessibility essentials, I strongly recommend this introduction from the World Wide Web Consortium (W3C). It's very much one for your bookmarks.