avneetJ

Problem: We added the Czech language and translated the pages to it. The URL slug is /cs but we need to change it to /cz

Solution: In this case you have two options:
1.- Add a custom language in WPML -> Languages -> Edit Languages link
2.- Change the language code in the database by following the steps described in this link: https://wpml.org/documentation/support/editing-wpmls-languages-table/#editing-languages-directly-in-the-database

Relevant Documentation: