I'm having an issue with Odoo 18 website. The default language is EN, additional languages are DE & ES. When on one of these on a mobile device and then clicking on the EN flag, it doesn't show the EN version, stays on the other language. But when I add /en to the URL, it works. How can I fix this without having to add the /en?
Is there a setting somewhere that forces Odoo to use the language prefix in the URL?