I created a custom namespace in my mediawiki as below following this doc: https://www.mediawiki.org/wiki/Manual_talk:Using_custom_namespaces
I created a namespace as bellow:
define("NS_CAFE", 3000); // This MUST be even.
define("NS_CAFE_TALK", 3001); // This MUST be the following odd integer.
$wgExtraNamespaces[NS_CAFE] = "کافه";
$wgExtraNamespaces[NS_CAFE_TALK] = "کافه_بحث"; // Note underscores in the namespace name.
$wgNamespaceProtection[NS_CAFE] = array( 'editfoo' ); // permission "editfoo" required to edit the foo namespace
$wgNamespacesWithSubpages[NS_CAFE] = true; // subpages enabled for the foo namespace
$wgGroupPermissions['sysop']['editfoo'] = true; // permission "editfoo" granted to users in the "sysop" group
$wgContentNamespaces[] = NS_CAFE;
AS NS_CAFE is in our language then what values should be for $wgNamespaceProtection[NS_CAFE] and for second array element of $wgGroupPermissions['sysop'] ?