Cannot submit Dynamic Data List with a required field in a non-default language

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, Master
• Fix Version/s: 7.1.10 DXP FP20, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP7, 7.2.X, 7.3.3 CE GA4, 7.3.5 CE GA6, 7.3.10 DXP GA1, Master
• Component/s: Dynamic Data Lists
• Labels:
  • ee-ts
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-20-7110
  • liferay-fixpack-dxp-7-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/leoadb/liferay-portal/pull/917

Steps to reproduce:

1. Log in as Admin
2. Go to Content > Dynamic Data Lists > Manage Data Definitions
3. Add a new data definition
4. Add any field, make it required then save the definition
5. Add a translation to the definition (eg. German)
6. Create a Dynamic Data List based on this definition
7. Go to the main site, place a Dynamic Data Lists Display portlet on the page
8. Select the Dynamic Data List you created in step 6
9. Go into the portlet's Configuration menu > Optional Configuration tab and select Form view
10. Submit the list in English - it works as expected
11. Switch the site's language to German
12. Submit the list again

Actual result: There is no success (or failure) message on the UI. In the console you get an error:
2020-06-05 13:03:48.733 ERROR [http-nio-8080-exec-8][PortletServlet:119] javax.portlet.PortletException: com.liferay.dynamic.data.mapping.validator.DDMFormValuesValidationException$RequiredValue: No value defined for field name TextEN
javax.portlet.PortletException: com.liferay.dynamic.data.mapping.validator.DDMFormValuesValidationException$RequiredValue: No value defined for field name TextEN

Expected result: The list can be submitted.