Problem: If you're experiencing issues where a post-type set as "Not translatable" is still generating accessible URLs in other languages, Solution: We want to inform you that this is expected behavior. Posts, pages, or products without language information can still be accessed if the language is typed directly into the URL. This happens even though these URLs are not generated by WPML. For a similar case, you can refer to our forum discussion here.
If this solution doesn't seem relevant to your situation, please feel free to open a new support ticket in our support forum.