If you have utf8 encoded strings in your program file, you need to use the utf8 pragma (see perldoc utf8). 

use utf8;

$s = 'holáéíóúon';
$s =~ tr/áéíóú/aeiou/;
print $s;
# prints holaeiouon

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In reply to Re^4: Playing with "funny" chars by itub
in thread Playing with extended chars by deibyz

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