Hi, 

on our Moodle - site people may choose wether they want to see our site

in English, German and Russian. 

This works well on the opening page, where people can choose a course category

or on the dashboard site. If they go to course page it does not work. 

Menus are still in German although they click Russian. What is more puzzling,

in one course the language switch works.

How can I find the error. Is this may due to language files in the Moodle - code tree ?

Any hint, info would be very nice !

Thanks a lot !

Thor