When integrating with other systems using a cookie for language negotiation, the value doesn't always match the language code. It may be a locale value with hyphens or underscores.
Include a configuration option to map cookie language codes to site languages, similar to the Drupal core Browser language negotiator. Allow for multiple cookie values mapped to the same language. Use the language code mappings when getting the correct langcode during language negotiation.
New configuration form elements for creating cookie language code to Drupal site language mappings. Allows for multiple cookie values mapped to the same site language.
None
New configuration item called "map" that holds key/value objects.
Active
2.0
Code
The tests that are failing are tests I added. I will try to circle back to this on my own time.