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My first question is whether I had to use

require Exporter;
...
our @ISA = qw(Exporter);
our @EXPORT =
  qw(  get_config get_trans get_from_lang get_to_lang reverse_trans);

# t/01-get_config.t
use strict;
...
ok($key eq 'blahblah', "get_config() : key has correct value"); $num_t
+ests++;
# END
done_testing($num_tests);