Hello

Thank you for your query.

Can you kindly check out the steps here in the documentation link below:

https://www.joomshaper.com/documentation/helix-framework/helixultimate/how-to-set-multilingual-site

Hope this helps you.

Hi / Czesc.

Later publish Language module in "menu" position.

Generally, I can add a language, but the menu does not allow me to change it, it is automatic https://imgur.com/a/LY68QYF

(PL) A robiłeś kiedyś wielojęzyczną stronę w Joomla ? Bo kursów Joomla, jako takich, nie prowadzimy.

You have to follow above guide (step 6 and later): you need two templates styles, one for PL and 2nd for English. And later choose menu different for each and assign template to selected menu items.

Menu you have to choose in "Menu" tab, not in Layout tab as you presented on the screenshot.