Maintainers for gutenprint-locales are Debian Printing Group <debian-printing@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: escputil, gimp-gutenprint, gutenprint-doc, libgutenprint-common, libgutenprint-dev, libgutenprint-doc, libgutenprint9, libgutenprintui2-2, libgutenprintui2-dev, printer-driver-gutenprint.
You might like to refer to the gutenprint-locales package page, to the Package Tracking System, or to the source package src:gutenprint's bug page.
If you find a bug not listed here, please report it.