Thank you Joost. I understood my mistake (and just this is a great goal)! When I retrieve data from MySQL I didn't tell it to make use of {mysql_enable_utf8 => 1}: 
$dbh = DBI->connect($datasource, $user, $passw, {mysql_enable_utf8 => 
+1})

[download]
If I well understand perl now has already all what he needs to work with unicode strings and, consequently, with regex. Thus I must delete the line decode("utf8"...) at the very end of my scrit and let alone those statements that must be printed out. Thank you again for submitting me that link.

In reply to Re^2: substitution regex and unicode by frasco
in thread substitution regex and unicode by frasco

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