Translations
Using Jamroom
Those languages are not available simply because we can't translate the language file into any of those languages.
The ProJam skin has a loosely translated language file for Spanish, so this can be done, just translate the English language file into the language you want and then add a link for it like this:
Using Spanish as an example
<a href="?set_user_language=es-ES">Spanish</a>
Then when a user clicks the link, your site will be translated into Spanish.
Hope this helps,
Douglas