Hello
I want to have a custom column with "language" metatag, which appears in content.opf file (epub).
I have been looking for documentaction, but I can manage it work, like "isbn" or "series" examples. there is a metatag "language over here
http://calibre-ebook.com/user_manual...data.book.base
could someone help me? I am going bananas trying this works.
Thank you