Unfortunatly, that method for changing the text for internationalization won't work. use constant is evaluated at compile-time, thus if code is compiled, a use constant in it will take effect, to illustrate this:

#!/usr/bin/perl -w
use strict;
use constant TEST => 'outside';
if (0) {
  use constant TEST => 'if(0)';
}
print TEST, "\n";
__END__
outputs: 
Constant subroutine TEST redefined at ...
if(0)
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