I am trying to make a change language functionality for a multilingual shop. So, the problem is that I can’t understand how the oxid default functionality manages it. The are a lot of variables related to language. What exactly should I set in order to make the change correctrly? I see the language cookie which is always uptodate with current language. I have scanned whole project and didn’t find even where is being creating. Nothing relative in code to this cookie. What hapens when the current url where the user is, is seo url?