Settings: Fix default language priority - refs BT#21104

src/CoreBundle/Settings/LanguageSettingsSchema.php

@@ -23,9 +23,9 @@ class LanguageSettingsSchema extends AbstractSettingsSchema
                     'allow_use_sub_language' => 'false',
                     'auto_detect_language_custom_pages' => 'true',
                     'show_different_course_language' => 'true',
-                    'language_priority_1' => 'platform_lang',
-                    'language_priority_2' => 'platform_lang',
-                    'language_priority_3' => 'platform_lang',
+                    'language_priority_1' => 'course_lang',
+                    'language_priority_2' => 'user_profil_lang',
+                    'language_priority_3' => 'user_selected_lang',
                     'language_priority_4' => 'platform_lang',
                     'hide_dltt_markup' => 'false',
                     'show_language_selector_in_menu' => 'true',