Problem with language switcher

Hello, I have problems with my website that I can’t change language beetewen every page of the website.

For example, If I visit the home page and click on the spanigh flag the laguange not change, so it loading the same page again..

If i check the wordpress dashboard, it seems all ok, so each page is connected between itself but in fact not work.

Can you help me? Any suggest?

thanks

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