CL-L10N is a portable localization package for Common Lisp which is more or less modelled on the Allegro Common Lisp locale package. It currently supports various accessors (like locale-mon), number printing, money printing and time/date printing.
The CL-L10N Home Page is at http://www.common-lisp.net/project/cl-l10n where one can find details about mailing lists, cvs repositories and various releases.
Enjoy Sean.