mount not working for utf-8

I've set the locale: $locale LANG="en_GB.UTF-8" LC_COLLATE="en_GB.UTF-8" LC_CTYPE="en_GB.UTF-8" LC_MESSAGES="en_GB.UTF-8" LC_MONETARY="en_GB.UTF-8" LC_NUMERIC="en_GB.UTF-8" LC_TIME="en_GB.UTF-8" LC_ALL= However, while this mount works: $ mount -t smbfs "//Mercury/Echo" "/Volumes/Echo" Password for Mercury: This mount fails: $ mount -t smbfs "//Προκρούστης/DiningRoom" "/Volumes/DiningRoom" mount_smbfs: URL parsing failed, please correct the URL and try again: Invalid argument Any suggestions as to how to fix this?