=== modified file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/appmanager/AppStatus.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/appmanager/AppStatus.java	2016-01-04 02:27:49 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/appmanager/AppStatus.java	2016-01-04 16:36:24 +0000
@@ -30,12 +30,13 @@
 
 public enum AppStatus
 {
-    OK( "OK" ), 
-    NAMESPACE_TAKEN( "Namespace defined in manifest is protected" ), 
-    INVALID_ZIP_FORMAT( "Zipfile could not be read" ), 
-    INVALID_MANIFEST_JSON( "Invalid JSON in app manifest file" ), 
-    INSTALLATION_FAILED( "App could not be installed on file system" ),
-    NOT_FOUND( "App could not be found" );
+    OK( "ok" ), 
+    NAMESPACE_TAKEN( "namespace_defined_in_manifest_is_in_use" ), 
+    INVALID_ZIP_FORMAT( "zip_file_could_not_be_read" ), 
+    INVALID_MANIFEST_JSON( "invalid_json_in_app_manifest_file" ), 
+    INSTALLATION_FAILED( "app_could_not_be_installed_on_file_system" ),
+    NOT_FOUND( "app_could_not_be_found" ),
+    MISSING_SYSTEM_BASE_URL( "system_base_url_is_not_defined" );
     
     private String message;
     

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/resources/i18n_global.properties'
--- dhis-2/dhis-services/dhis-service-core/src/main/resources/i18n_global.properties	2015-12-24 00:21:36 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/resources/i18n_global.properties	2016-01-04 16:36:24 +0000
@@ -945,6 +945,15 @@
 app_order_name_alpha=Alphabetical
 app_search_placeholder=Search apps
 
+#-- App manager----------------------------------------------------------------#
+
+namespace_defined_in_manifest_is_in_use=Namespace defined in manifest is already in use
+zip_file_could_not_be_read=Zipfile could not be read
+invalid_json_in_app_manifest_file=Invalid JSON in app manifest file
+app_could_not_be_installed_on_file_system=App could not be installed on file system
+app_could_not_be_found=App could not be found
+system_base_url_is_not_defined=System base URL is not defined
+
 #-- Data value error codes ----------------------------------------------------#
 
 data_element_or_type_null_or_empty=Data element or type is null or empty

=== modified file 'dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/webapi/controller/AppController.java'
--- dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/webapi/controller/AppController.java	2016-01-04 02:27:49 +0000
+++ dhis-2/dhis-web/dhis-web-api/src/main/java/org/hisp/dhis/webapi/controller/AppController.java	2016-01-04 16:36:24 +0000
@@ -39,6 +39,7 @@
 import org.hisp.dhis.dxf2.webmessage.WebMessageException;
 import org.hisp.dhis.external.location.LocationManager;
 import org.hisp.dhis.hibernate.exception.ReadAccessDeniedException;
+import org.hisp.dhis.i18n.I18nManager;
 import org.hisp.dhis.setting.SettingKey;
 import org.hisp.dhis.system.util.DateUtils;
 import org.hisp.dhis.webapi.utils.ContextUtils;
@@ -81,7 +82,10 @@
 
     @Autowired
     private LocationManager locationManager;
-        
+    
+    @Autowired
+    private I18nManager i18nManager;
+    
     private final ResourceLoader resourceLoader = new DefaultResourceLoader();
 
     // -------------------------------------------------------------------------
@@ -129,7 +133,9 @@
         
         if ( !status.ok() )
         {
-            throw new WebMessageException( WebMessageUtils.conflict( status.getMessage() ) );
+            String message = i18nManager.getI18n().getString( status.getMessage() );
+            
+            throw new WebMessageException( WebMessageUtils.conflict( message ) );
         }
     }