Background of the issue:
I'm using ACF Pro and have set up a CPT called 'Case Studies' via ACF's UI. I want the custom posts to show up under a specific page: /referenzen/erfolgsgeschichten/{cpt-title}. I have managed to do so by going to the advanced ACF settings in the URLs tab and changing the following: Set the 'Permalink Rewrite' to 'Custom Permalink' and set 'URL Slug' to 'referenzen/erfolgsgeschichten'.
Symptoms:
I need to translate the URL slug for other languages.
Questions:
How can I translate the URL slug for other languages?
What is the desired result for English: 'references/case-studies/{cpt-title}'?
Welcome to the WPML support forum. I will do my best to assist you in resolving the issue.
Please try the following steps after taking a full site backup, and check if the issue is resolved:
1) Go to WPML >> Settings >> Slug Translations
2) Enable the option: “Translate base slugs of custom post types and taxonomies (via WPML → Taxonomy translation)”
3) Scroll down to the Post Types Translation section
4) Click on “Set different slugs in different languages”
5) Enter the translated slug for each language and save the changes
6) Go to Settings >> Permalinks and click Save Changes (no need to modify anything)
7) Clear all types of caches (plugin, browser, server, CDN, etc.)
For more details, you can refer to the following documentation: