JForum multi lingual

I have a Java site that is translated into several languages.
Therefore, I am looking for a Java forum that supports multiple languages.

Of course each language could have its own forum, but since most europeans understand more than one language (2 - 4 are normal) It would be nice if the user could mark the languages he can read, e.g. English, German, Danish, and then read all comments for a specific topic in these 3 languages simultaneously.

Example:
If the user marks English, German, Danish as spoken languages and is interested in 'Motors' then all comments in these 3 languages (only) are presented for the user.

It is quite anoying to change language all the time in order to read all comments of interest.

[originally posted on jforum.net by allan]

Results from all related forums are shown to the user? Does another forum engine have this feature, so we can take a closer look?

Rafael
[originally posted on jforum.net by Rafael Steil]

not even jive has this feature. And jive costs a few thousand dollars a year ^^

in my eyes this only makes sense for "searching". in any other case it would blow up the forum way too much i think
[originally posted on jforum.net by Sid]