How to hook into get_navigation?

[WebDevandPhoto]

Is it possible to reformat the output for get_navigation(return_page_slug()); in a plugin? If so what is the hook and is there an existing sample plugin I can look at?

[Connie]

I think you could check the i18N-plugin and it's possibilities, mvlcek did a great job with that!

[shawn_a]

There is the menuitems filter called inside get_navigation.
Of course this is already html, so you would have to replace it all, or parse it.