World Zones with special characters aren't shown well

phpMyAdmin - 2.10.3
MySQL: 5.0.95

In the DB I set the Collaction of field zone_name of table zone to utf8_unicode_ci
Using phpMyAdmin I can correctly read the name of all zones also with special characters (for example 436 Bucureşti or 443 Башкортостан)
When I change the shipping address on the website the special characters aren't shown well (for example I show id 436 as Bycare?ti or id 443 ???????????)

I tried to change the code of file includes/languages/english.php

define('CHARSET', 'iso-8859-1');

with code

define('CHARSET', 'utf8');

but without good result :no:

How can I solve this issue ?
I need a complete table zones with English name or I need to show all zones name correctly and with special characters

Thank You