mle-1.0.2-build4: {lang} brings "Languages not set"-Error

[OlafNoehring]

Hi

I have installed (cmsms-mle-1.0.2-build4).
I have selected several languages while the installation process as frontend languages. (english- which you can not deselect, german, french, italian, spanish).
When I open the single existing page after install (home) it says in the upper right corner "Languages not set!".
Where do I set languages for my pages?
I have also created a new page with the standard template: I did not find where I set the (frontend)language for a page.

Can anyone help?

Olaf