Hi.

I18n does not work for the Navigation when the content for all the languages is in one site tree.

For I18n Content support I have the following setting:
Configuration->/server/i18n/content/class is set to info.magnolia.cms.i18n.DefaultI18nContentSupport.

In the page properties dialog, I have two nodes for the navigation titile: "navigationTitle" and "navigationTitle_de".
When I switch the language between English and German, all the content on the page changes, except for the navigation.

I found that the problem is in info.magnolia.module.templatingkit.navigation.SubNavigation.
The getItems() method, when creating a new NavigationItem should wrap the child Content element with I18nContentWrapper.
Here is the problematic line with the fix applied:

NavigationItem mp = new NavigationItem(new I18nContentWrapper(child), this, depth-1, allOpen);

There is also Patch included.

Thanks,
Bobi.