Ok, in the content template "training-list-item.jsff" (From Yannick's tutorial, he is hard coding the region definition as "RD_TRAINING".
Can I change it dynamically?
I have now added three buttons to the courses.jspx page(English, Swedish and Spanish) and three different region definitions for each language. My objective is to display different regions on the button click. To achieve that, I need to find some way to dynamically change the region definition value from the content template.