Describe the bug
Initiatives use "DNI/NIE" in its locales:

This concept is only valid for Spain, as not all countries have personal IDs (AFAIK), or at least they won't have "DNI/NIE". This should be generalized.

To Reproduce
Check the locales.

Expected behavior
Locales shouldn't mention anything specific to Spain.

Screenshots
None

Stacktrace
None

Extra data (please complete the following information):

• Decidim Version: current develop

Additional context
None