This plugin creates Word Wise and X-Ray sqlite files for Kindle format books, it also adds these data as <ruby> tags and footnotes to EPUB books. If an e-reader device is connected, it'll send the book and created files to the device.

It uses spaCy to find named entities as X-Ray, 22 languages are supported. X-Ray descriptions come from Wikipedia, locator map, Democracy Index and country/city inception data are queried from Wikidata. Wiktionary files downloaded from https://kaikki.org are used for EPUB Word Wise.