Default language of user interface is English, and national characters are encoded in UTF-8. For proper display of national characters in other languages you must define appropriate locales. E.g. for polish language it's achieved by running the following command:
# localedef -v -c -i pl_PL -f UTF-8 /usr/share/locale/pl_PL.UTF-8Instructions about database encoding settings in follow-up of this chapter.