'locale' is almost entirely dependent on the underlying OS, and then further on the libs and installed modules. Have a look on your perllocale manual to check how to tackle.

I think you might do 2 things to go on:

1) Check what locale settings are installed/available to you in the working environment (perllocale suggests a number of ways to do that)

2) Once you made sure the locale you want to use is available, go ahead with your code, but always do check also that the setting was successfull:
...
my $loc = setlocale( LC_ALL, 'lt');

die 'Could not switch to locale "lt"!'
    if $loc ne 'lt';
....

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In reply to Re: Sorting according to locale collation by Krambambuli
in thread Sorting according to locale collation by amir_e_a

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