Problem: The client is trying to embed a language switcher inside every post using an HTML block that includes an image, some text, and the language switcher. They attempted to use the Gutenberg block and a widget switcher with a shortcode, but neither method worked within the HTML block. Solution: 1. We asked the client to share the URL of the backend where they tried to add the language switcher and the exact shortcode they used. 2. We suggested adding the code directly into the theme's files for more control, and provided a documentation link: Adding language switchers using PHP and shortcodes. 3. We offered to take a look at the issue ourselves, but required confirmation of a site backup and the necessary credentials to be added in the private fields.
If this solution doesn't look relevant to your issue, please feel free to open a new support ticket at WPML support forum.
