Netherlands has Two prefixes (90 and 94) with Identifiers of 978 * locales/fy_NL (LC_ADDRESS): Add country_isbn. * locales/li_NL (LC_ADDRESS): Add country_isbn. * locales/nds_NL(LC_ADDRESS): Fix country_isbn. * locales/nl_NL (LC_ADDRESS): Add country_isbn. https://sourceware.org/ml/libc-alpha/2017-08/msg01278.html