Jakarta Commons projects have a problem because they would like to create a custom site template working with the xdoc plugin >= 1.9 (with I18n) and the xdoc plugin <= 1.8 (without i18n) It's actually impossible because of the fmt lib and some others problems. Details are in theses threads : http://mail-archives.apache.org/mod_mbox/jakarta-commons-dev/200509.mbox/%3c1c661f2f05090118553501ffbe@mail.gmail.com%3e http://mail-archives.apache.org/mod_mbox/jakarta-commons-dev/200509.mbox/%3c1c661f2f05090914524f42b194@mail.gmail.com%3e