show load language error only when language resource does not exist in cache

src/scripts/services/ariaNgLanguageLoader.js

@@ -115,10 +115,12 @@
                 return deferred.resolve(languageObject);
             }).catch(function onError(response) {
                 ariaNgLogService.warn('[ariaNgLanguageLoader] cannot get language resource');
+                if (!languageResource) {
                     ariaNgNotificationService.notifyInPage('', 'AriaNg cannot get language resources, and will display in default language.', {
                         type: 'error',
                         delay: false
                     });
+                }
                 return deferred.reject(options.key);
             });