automatic language detection for multilingual website!!

Hello,
I really need my visitors to be redirected according to the language defined in their browser and not according to the language recorded during the last session.
The solution exists in the Wix language app . So, I can not believe that WiX code that is supposed to go further and better “without limit”, does not help in this case.
Unfortunately, I can not use this app because I can not duplicate the page of my Ecwid online store (which does translate according to the browser language). So it results impossible to display to the header menus of my online store page according to language of the visitor. The result is not profesional at all

So, I would really appreciate if someone from Wix team could help me to redirect visitors based on the browser language. I know it’s possible with Javascript but I do not know how to integrate it if it’s unique solution.
Thank you for your help