It seems that none of the sh-utils programs in Red Hat 7 have localization, although localizations exist (see http://www2.iro.umontreal.ca/~pinard/po/registry.cgi?domain=sh-utils). I tested this with Swedish. I don't know if this is the maintainer's fault or something in the Red Hat packaging/compiling (statically linked?) but it would indeed be nice with translations of some of the most used utils, now when such translations exist.
Localization files were not included , fixed in sh-utils-2.0-12.