The plugin is WPML but as I said, I am not using their "WPML translate" for posts because for my SEO it's not efficient. So I'm doing what I said in my previous reply and I attach you a screenshot of what I mean. But I don't know why with this particular post, it didn't work as the other ones and I don't know how to relate those two posts together without redoing everything from scratch. 

Thanks

For this, I edit post in Elementor and then I go to language "translate this document in Wordpress Editor". Usually the two posts relate but those two ones, I can't and I don't know why and I don't how I can relate both. 

Hello, 

I would like this post https://takeabreaksomewhere.com/salkantay-trek/ to be the translation of this post https://takeabreaksomewhere.com/fr/trek-salkantay/ but I can't relate it through the language part of the blog post. How can I do please ? 

Thanks