on OSX (10.9.3) and PHP (5.4.24) you need to use full local name including codeset
i.e. for German need to use de_DE.UTF-8 even setlocale returns success when used without .UTF-8 the lookups will not work.
on OSX (10.9.3) and PHP (5.4.24) you need to use full local name including codeset
i.e. for German need to use de_DE.UTF-8 even setlocale returns success when used without .UTF-8 the lookups will not work.