Automatic translation on mobile devices


I am currently finishing my website. I noticed with my alternative link, which is automatically translated into the respective language on some mobile devices.

This is not the case with my old site, which is still online. Englisch only.

I forgot something in the preferences. I want it to be communicated exclusively in English and that is why my content is also in English only. Thanks for any help in advance !

Here is my site Read-Only: LINK
(how to share your site Read-Only link)