Hmm...why do you have different sections/categories and articles for different languages? This is the wrong way to do this. You should consider using Joomfish and adding translations to articles rather than  adding new articles, that's the right way to do this and that would work best with news portal.

However, if you can't do that. I am at least hoping that you have a hierarchy that looks like this:

Each language has a section, and under that categories for that language. If thats the case, then you can use news portal easily because you get a page for each section and each category.

If that's not the case, then you can either create a sub domain for each language and install news portal on each sub domain, or switch to magazine where you can create magazines and issues unrelated to your hierarchy.

There is no way to install news portal twice on the same joomla installation.