There are a couple of ways to change the course language. 


1)    from your course overview you can click on the button with a countries flag. Then you can choose from the other languages available. The simply start a module.


2)    If you have already started a module you can pause the video and click on the CC button in the bottom right corner. Select the language you wish to use. The continue the video.


The video will continue to play audio in English but will display subtitles in the language you have selected.


The validation exam will be shown in the language of your choice.