chinese utf8 support in codeignitter

[eluser]Ludwig Mair[/eluser]
Hello,

i am new in this forum and even to work with codeigniter. I like it.
i try to build a multi language site.
I work with the newest version of codeigentier.

But unfortunately, i can not get shown the special character right for languages like german, czech, chinese or russian. i just get question marks.
I checked already the settings of my browser.
it is set to utf-8.

What do i have to do to get this issue solved?

Thanks in advance

Ludwig