Problem: The client reported that even though Woo translations for regions and countries are downloaded, they are not displayed in dropdowns in checkout and settings > Woo > Delivery zones. The Bulgarian strings are displayed instead. Additionally, the filter titles are not visible as strings. Solution: We advised the client to check the language settings of the affected strings in WPML > String Translation. It appears that the strings were assigned to the wrong language. We recommended changing the language of these strings and verifying that the translations are correct. This adjustment should resolve the issue, and the correct translations should then appear on the frontend.
If the problem persists or if this solution becomes outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 these steps do not resolve the issue, please open a new support ticket.