Bob

Problem:
The client wants a different site logo for each language on their WordPress site using a child theme of Twenty Twenty-One. They have translated the string [theme_mods_acorn]custom_logo with the relevant image ID but are still seeing the same logo across different languages.
Solution:
We recommend using WPML's String Translation to manage different logos for each language. Here are two methods to achieve this:
Method 1:
Navigate to WPML > String Translation. At the bottom of the page, enable the checkbox 'Look for strings while pages are rendered'. Visit the front end of a page displaying the logo, then return to WPML > String Translation and search for the string to see if it appears.
Method 2:
If the string does not appear in WPML > String Translation, it might be categorized as admin text. Follow the guide on finding and translating admin text strings: https://wpml.org/documentation/getting-started-guide/string-translation/finding-strings-that-dont-appear-on-the-string-translation-page/

If these steps do not resolve your issue, or if the solution seems outdated or irrelevant to your specific case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If needed, please open a new support ticket for further assistance.