The materail and rendering engine are updated in NX 11. There is a new materail editor to give more control and better realism in regards to certain materail types. Here is good starting place to get you going in the right direction.
The online NX docs reads the language defined in your OS. Therefore, go to the Windows "Control Panel" and select Region and Language. On the Formats tab, change the Format to English, select OK, restart your browser and reload the page from the docs.