If you want to create an additional URL alias for a translation of a content in the main location, the siteaccess of the translation is not selectable. Only the site access for the main language is available.

Steps for reproduction

• Set up Ibexa DXP 3.3
• Activate an additional language in the backend
• Set up the siteaccess for the additional language according to the instructions
• Create a new folder "test-123" in the backend in the main language.
• translate this new folder "test-123
• Select the URL tab and set up an alias for the translation.
• the language siteaccess of the translation is not selectable

URL aliases for translations cannot be set up.