Quote:
Originally Posted by Doitsu
Each time you change metadata entries with Calibre, the file doesn't actually get updated, even though Calibre displays the updated metadata information.
In order to make the changes permanent you'll have to select Save to disk or transfer the file to a Kindle connected via USB.
(This bug feature is one of the reasons why I don't use Calibre to manage my books.)
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Why do you not just use Polish Book (works for EPUB/AZW3) or the newer Embed Metadata (all formats)? Both will update any metadata which a Send-to-Device is capable of updating, but in the in-library copy.
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On the mystery of the missing language metadata, it is possible for an ebook to specify override languages via the lang attribute for individual pages/paragraphs/words. Which takes precedence over the language specified in the book-level metadata.
I don't read non-English books, so I have no reason to have tested it, but I am pretty sure the Kindle is supposed to properly recognize that.
And since ebook producers often include a lot of extraneous junk, that might include messes of language overrides.
Granted, the solution instead turned out to be "hey, wrong book file". But the theory is what matters.
