diff --git a/modeltranslation/admin.py b/modeltranslation/admin.py
index 1a7aa4b..7ccc6c7 100755
--- a/modeltranslation/admin.py
+++ b/modeltranslation/admin.py
@@ -270,8 +270,9 @@ class TranslationAdmin(TranslationBaseModelAdmin, admin.ModelAdmin):
             flattened_fieldsets = flatten_fieldsets(fieldsets)
 
             # Create a fieldset to group each translated field's localized fields
+            fields = sorted((f for f in self.opts.get_fields() if f.concrete))
             untranslated_fields = [
-                f.name for f in self.opts.fields if (
+                f.name for f in fields if (
                     # Exclude the primary key field
                     f is not self.opts.auto_field and
                     # Exclude non-editable fields
@@ -359,8 +360,8 @@ class TabbedDjangoJqueryTranslationAdmin(TranslationAdmin):
     class Media:
         js = (
             'modeltranslation/js/force_jquery.js',
-            '//ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js',
-            '//cdn.jsdelivr.net/jquery.mb.browser/0.1/jquery.mb.browser.min.js',
+            mt_settings.JQUERY_UI_URL,
+            mt_settings.JQUERY_MB_BROWSER_URL,
             'modeltranslation/js/tabbed_translation_fields.js',
         )
         css = {
@@ -375,9 +376,9 @@ class TabbedExternalJqueryTranslationAdmin(TranslationAdmin):
     """
     class Media:
         js = (
-            '//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js',
-            '//ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js',
-            '//cdn.jsdelivr.net/jquery.mb.browser/0.1/jquery.mb.browser.min.js',
+            mt_settings.JQUERY_URL,
+            mt_settings.JQUERY_UI_URL,
+            mt_settings.JQUERY_MB_BROWSER_URL,
             'modeltranslation/js/tabbed_translation_fields.js',
         )
         css = {
diff --git a/modeltranslation/settings.py b/modeltranslation/settings.py
index 309075d..d32266f 100644
--- a/modeltranslation/settings.py
+++ b/modeltranslation/settings.py
@@ -54,3 +54,10 @@ for key, value in FALLBACK_LANGUAGES.items():
 ENABLE_FALLBACKS = getattr(settings, 'MODELTRANSLATION_ENABLE_FALLBACKS', True)
 
 LOADDATA_RETAIN_LOCALE = getattr(settings, 'MODELTRANSLATION_LOADDATA_RETAIN_LOCALE', True)
+
+JQUERY_URL = getattr(settings, 'JQUERY_URL',
+                     '//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js')
+JQUERY_UI_URL = getattr(settings, 'JQUERY_UI_URL',
+                        '//ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js')
+JQUERY_MB_BROWSER_URL = getattr(settings, 'JQUERY_MB_BROWSER_URL',
+                                '//cdn.jsdelivr.net/jquery.mb.browser/0.1/jquery.mb.browser.min.js')