I submitted both eBook (Kindle) and paperback yesterday and the eBook went live within a few hours, without any errors being picked up by KDP. On the other hand, my paperback version hasn't been published due to the following error: Metadata The language (e.g., Spanish) in your cover file doesn't match the language you chose during title setup. I'm not sure what this means exactly. "In your cover file..."?? The book is written in English as is everything else in the KDP setup. The Kindle version of the cover is a simple JPG, but the paperback version is PDF and the content for both is identical, with the only Spanish word being Argentina. No other Spanish words are used. I know you can insert metadata into many files such as PDF and DOCX, by hitting 'properties' and then going to the metadata tab. At least you can in Inkscape, anyway, but there isn't any metadata embedded as far as I can see. Does anyone have any experience of this type of error?