UTF-8

[domestiko]

I've upgraded to Hoary, so I think this is not a question to be placed 
yet, but, if I could have some clues, I could rest more peacily.
Let's go.
I had read that one of the goals of Hoary was to be set up all on UTF-8, 
so I changed my locales {by dpkg-reconfigure locales} to 
UTF-8.es-es at euro. At first, it was all a mixed up, but day by day, 
upgrade by upgrade, the error messages were disappearing.
Not all of them, but.
How is it going to be the implementation of UTF-8 in Hoary? Will all the 
programs change to be adapted? Or will it be by means of an internal 
'translator'?

I keep on learning.