Hi Asakura, we don't have specific documentation for using dynamic DNS but if your Airtime server can be seen from the public Internet it should work exactly the same as when using conventional DNS. If you are streaming from home with a low bandwidth uplink, you would probably want to use a cache for schedule information or a stream repeater to scale up your audience. Let us know if you run into any troubles with that.
As for Esperanto translation, we will gladly support that if a fluent speaker volunteers to translate the strings. You can find details of the process here: http://www.sourcefabric.org/en/community/blog/1493 Google's automated tool for .po files at http://translate.google.com/toolkit supports Esperanto, so it should not take long to do for someone that knows the language well.
So what do i´ve to modify in the icecast2.xml file to get ir working, at this time i do can connect to the login screen from the public internet but, the jplayer dos not play any sound form public internet but plays from the inside lan if i put my page.