web.xml:
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>com.xpn.xwiki.web.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
xwiki.cfg:
xwiki.encoding = UTF-8
XWiki: XWikiPreferences:
Default Language:en