In T165562: Provide options to choose target namespace for publishing we used ContentTranslationTargetNamespace configuration to specify the default namespace for publishing. This is a wiki level configuration. A more granular configuration is desirable to specify the default namespce for groups.

We can name it as ContentnTranslationUserGroupTargetNamespace. The value is an associative array. An example:

"ContentTranslationTargetNamespace": 0,
"ContentnTranslationUserGroupTargetNamespace": {
	"extendedconfirmed": 0,
	"autoconfirmed": 2
}

Details

1. If the current user belongs to a group for which a namespce is defined in ContentnTranslationUserGroupTargetNamespace, set that as default namespace
2. If no match found in ContentnTranslationUserGroupTargetNamespace use wiki level namespace defined in ContentTranslationTargetNamespace
3. This is just the default value for namespace and does not force the value on any users. A translator is free to choose an alternate non-default namespace from the namespace selector developed in T165562: Provide options to choose target namespace for publishing
4. By default, CX will not have a configuration defined for ContentnTranslationUserGroupTargetNamespace. It can be optionally defined for a wiki on request and discussion basis.
5. Should work for CX1 and CX2