             guard self.language != oldValue else {
                 return
             }
-            self.languageChanged()
+            self.languageChanged(oldValue: oldValue)
         }
     }
 

        return self.string(format: self.string(for: key, resource: resource), args)
    }

    private func languageChanged() {
        self.locale = nil
        self.resources = [:]


            self.log("L10n - List of supported languages does not contain \"\(self.language)\"")
        }

        if let oldValue = oldValue {
            NotificationCenter.default.post(name: .L10nLanguageChanged, object: self, userInfo: [
                "oldValue": oldValue,
                "newValue": self.language,
            ])
        }
    }

    private func resource(named resourceName: String?) -> L10nResource {
