[NTG-context] <dc:language> to XMP info?

Hi Hans, I need to access the document language using Poppler’s GObject introspection. Right now, the only way to do that would be to have dc:language (https://raw.githubusercontent.com/adobe/XMP-Toolkit-SDK/main/docs/XMPSpecifi...) in the XMP metadata included in the PDF file. Would it be possible to have dc:language included in the XMP metadata (besides other DC elements, such as author, title, description or format)? Many thanks for your help, Pablo