diff -u b/core/modules/config_translation/migration_templates/d6_i18n_user_profile_field_instance.yml b/core/modules/config_translation/migration_templates/d6_i18n_user_profile_field_instance.yml
--- b/core/modules/config_translation/migration_templates/d6_i18n_user_profile_field_instance.yml
+++ b/core/modules/config_translation/migration_templates/d6_i18n_user_profile_field_instance.yml
@@ -1,4 +1,4 @@
-id: i18n_user_profile_field_instance
+id: d6_i18n_user_profile_field_instance
 label: User profile field instance configuration
 migration_tags:
   - Drupal 6
diff -u b/core/modules/config_translation/tests/src/Kernel/Migrate/d6/MigrateI18nUserProfileFieldInstanceTest.php b/core/modules/config_translation/tests/src/Kernel/Migrate/d6/MigrateI18nUserProfileFieldInstanceTest.php
--- b/core/modules/config_translation/tests/src/Kernel/Migrate/d6/MigrateI18nUserProfileFieldInstanceTest.php
+++ b/core/modules/config_translation/tests/src/Kernel/Migrate/d6/MigrateI18nUserProfileFieldInstanceTest.php
@@ -24,7 +24,7 @@
     $this->executeMigrations([
       'user_profile_field',
       'user_profile_field_instance',
-      'i18n_user_profile_field_instance',
+      'd6_i18n_user_profile_field_instance',
     ]);
   }
 
diff -u b/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php b/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php
--- b/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php
+++ b/core/modules/migrate/src/Plugin/migrate/destination/EntityConfigBase.php
@@ -121,11 +121,11 @@
    *   The row object to update from.
    */
   protected function updateEntity(EntityInterface $entity, Row $row) {
-    // If this row has a language code and it is not the default language
+    // If this row has a language code and it is not the active language
     // and the language manager is configurable then this is a row with a
     // translation string.
     if ($row->hasDestinationProperty('langcode') &&
-      ($row->getDestinationProperty('langcode') != $this->languageManager->getDefaultLanguage()->getId()) &&
+      ($row->getDestinationProperty('langcode') != $this->languageManager->getCurrentLanguage()->getId()) &&
       ($this->languageManager instanceof ConfigurableLanguageManagerInterface)) {
       $config = $entity->getConfigDependencyName();
       $config_override = $this->languageManager->getLanguageConfigOverride($row->getDestinationProperty('langcode'), $config);