The documentation of POSIX uses a different way to refer to locale subtypes: constants. 
perl -we 'use locale; use POSIX; POSIX::setlocale(POSIX::LC_NUMERIC, "
+hu_HU.UTF-8"); printf qq{%f\n}, 123.456;'

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Note: Tested with cs_CZ locale, as hu_HU is not installed here.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Perl, Gtk2 and locale — a bit of a mess by choroba
in thread Perl, Gtk2 and locale — a bit of a mess by Ralesk

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