I voted for bareword too. But I don't consider one => 'un' as being bareword as => explicitly (AFAIK) defines the word to it's left as being quoted.

OTOH I render $en2fr{one} as being use of a bareword which I absolutely dislike. Consider this example and tell me without testing it's output:

$umask= umask;
$hash{$umask}='umask value';
$hash{'umask'}='umask text';
print $hash{umask};
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• Is the output 'umask text'?
  How can you make sure it will be 'umask value'?
• Or is the output 'umask value'?
  How can you make sure it will be 'umask text'?