1. Create a Content Type with an ezselection field that is both required and not translatable.
2. Create an object of this Content Type in a first language.
3. Create a new translation.
4. You can notice that the field is greyed as it is not translatable.
5. Try publishing.
6. Error: "Value for required field definition 'target' with language 'dut-BE' is empty". However, the field is disabled, but filled with the primary language's choice.

Content Type:

Error in admin interface: