diff --git a/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettingsTaxonomyVocabulary.php b/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettingsTaxonomyVocabulary.php
index 4cde5687f6a4a984bddc803ffd0b2f5829c12f69..7787865b61ba1dfd1ea1adfac6ac3e6fadd0f928 100644
--- a/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettingsTaxonomyVocabulary.php
+++ b/core/modules/language/src/Plugin/migrate/source/d6/LanguageContentSettingsTaxonomyVocabulary.php
@@ -19,8 +19,14 @@ class LanguageContentSettingsTaxonomyVocabulary extends DrupalSqlBase {
    * {@inheritdoc}
    */
   public function query() {
-    return $this->select('vocabulary', 'v')
-      ->fields('v', ['vid', 'language']);
+    $query = $this->select('vocabulary', 'v')
+      ->fields('v', ['vid']);
+    if ($this->getDatabase()
+      ->schema()
+      ->fieldExists('vocabulary', 'language')) {
+      $query->addField('v', 'language');
+    }
+    return $query;
   }
 
   /**
@@ -44,9 +50,9 @@ public function prepareRow(Row $row) {
     // 2 - Predefined language for a vocabulary and its terms.
     // 3 - Per-language terms, translatable (referencing terms with different
     // languages) but not localizable.
-    $i18ntaxonomy_vocabulary = $this->variableGet('i18ntaxonomy_vocabulary', NULL);
+    $i18ntaxonomy_vocabulary = $this->variableGet('i18ntaxonomy_vocabulary', []);
     $vid = $row->getSourceProperty('vid');
-    $state = FALSE;
+    $state = 0;
     if (array_key_exists($vid, $i18ntaxonomy_vocabulary)) {
       $state = $i18ntaxonomy_vocabulary[$vid];
     }
diff --git a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php
index c709859f764e42438153ebcc974ba40a2b40e4a7..e4abb3d9fe68ea41197c8156b0a4ca7b9d42cd75 100644
--- a/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Plugin/migrate/source/d6/LanguageContentTaxonomyVocabularySettingsTest.php
@@ -75,7 +75,33 @@ public function providerSource() {
       ],
     ];
 
+    // Test without a language column in the database.
+    $tests[1] = $tests[0];
+    foreach ($tests[1]['source_data']['vocabulary'] as $key => $row) {
+      unset($tests[1]['source_data']['vocabulary'][$key]['language']);
+    }
+    $tests[1]['source_data']['variable'] = [
+      [
+        'name' => 'i18ntaxonomy_vocabulary',
+        'value' => 'a:4:{i:1;s:1:"0";i:2;s:1:"0";i:3;s:1:"3";i:5;s:1:"1";}',
+      ],
+    ];
+    $tests[1]['expected_data'] = [
+      [
+        'vid' => 1,
+        'state' => 0,
+      ],
+      [
+        'vid' => 2,
+        'state' => 0,
+      ],
+    ];
+
+    // Test without a i18ntaxonomy_vocabulary variable.
+    $tests[2] = $tests[1];
+    unset($tests[2]['source_data']['variable']);
     return $tests;
+
   }
 
 }