Site Editor Classic Features

Hi

I am using a block theme (Twenty Twenty-three) with Site Editor Classic Features to be able to use the free version of Polylang. (I have three langages : english, french and italian).

However I have followed the instruction to add the legacy widget with the language selector, but I don’t know how to link the pages to the corresponding traductions. For example if I have a french version of a page “test (fr)” and the corresponding english version “test (en)” how do I link the two of them so that when I click on the langage selector it sends me to the correct translation ?

thank you very much for your answer