Polylang free version with theme Twenty Twenty Two

Thanks, but I’m confused – why would the test page, which has its own template, affect the way posts are displayed?

Sorry, I did not make myself clear because I do not know the theme of your site. So I am going to describe my situation, and you will understand what’s similar or different for you.
The theme of my site is a child theme of Twenty Twenty-Two that I have modified. I am using the same template for all my pages and a different one for all my posts. These 2 templates consist of 3 parts : a header, a main part and a footer. I use the header and the footer to display what I want to appear on each page, respectively each post, without having to retype it each time.
My page template and my post template use the same header, where I have placed the navigation and the pll short-code. Having only one header guaranties that if the short-code works for the pages, it will work for the posts.

When you said the short-code woks for the pages and not for the posts I imagine you had one header for the pages and another one for the posts, each with its own navigation and short-code.
I inspected the “questionnaire-presentation” and did not see the pll switcher : the short code was absent or having some kind of problem. I went to inspect the “language-test” page that you had posted previously and for which the short-code worked. It was now different : the navigation appears twice, in the header and in the main part, the pll switcher was no longer in the header but in the main part. The short-code works everywhere, but if you place it in the main part, you will have to retype it on every page and on every post, if you want the switcher to appear and hide the menus in languages other than the language of the current page or post. The short-code does both things together. If, for example, you want the switcher on pages and not on posts, then you can use 2 different headers, one for pages with the shot-code and all the menus and a different one for posts with only one menu in the language you want.
Let me know if this makes sense for you or if you have more questions.

• This reply was modified 2 years, 4 months ago by michel.b.
• This reply was modified 2 years, 4 months ago by michel.b.

Ahhh, this makes sense now! I simply hadn’t included the language switcher shortcode itself on the ‘single post’ template’.

The test page I posted is a mess because I finished that phase of testing and didn’t need it any more. ??

Thanks again for your help!

Hey, my dashboard now has a constant, extremely vague error at the top of the page:

Error occurred while updating document WordPress. Message: id value is not valid

I have absolutely no idea what to do with this, and the only similar bug reports I can find are like “Error occurred while updating document Widget”.

I’m guessing it’s something to do with this kludge, but I could be wrong! Have you seen anything similar, by any chance?

no, I haven’t seen this message. You can check if it is related to my short-code by removing it. Then you can also remove the id of each menu. If the message is still there, it will be another issue.