diff --git a/core/modules/language/migration_templates/d6_language_negotiation_settings.yml b/core/modules/language/migration_templates/d6_language_negotiation_settings.yml
index 097f706..bc5c133 100644
--- a/core/modules/language/migration_templates/d6_language_negotiation_settings.yml
+++ b/core/modules/language/migration_templates/d6_language_negotiation_settings.yml
@@ -6,13 +6,14 @@ source:
   plugin: variable
   variables:
     - language_negotiation
-  constants:
-    session_parameter: 'language'
-    selected_langcode: 'site_default'
 process:
-  'session/parameter': 'constants/session_parameter'
-  'selected_langcode': 'constants/selected_langcode'
-  'url/source':
+  session/parameter:
+    plugin: default_value
+    default_value: 'language'
+  selected_langcode:
+    plugin: default_value
+    default_value: 'site_default'
+  url/source:
     plugin: static_map
     source: language_negotiation
     map:
diff --git a/core/modules/language/migration_templates/d6_language_types.yml b/core/modules/language/migration_templates/d6_language_types.yml
new file mode 100644
index 0000000..05ce300
--- /dev/null
+++ b/core/modules/language/migration_templates/d6_language_types.yml
@@ -0,0 +1,52 @@
+id: d6_language_types
+label: Language types
+migration_tags:
+  - Drupal 6
+source:
+  plugin: variable
+  variables:
+    - language_negotiation
+process:
+  all:
+    plugin: default_value
+    default_value:
+      - 'language_interface'
+      - 'language_content'
+      - 'language_url'
+  configurable:
+    plugin: default_value
+    default_value:
+      - 'language_interface'
+  negotiation/language_content/enabled:
+    plugin: default_value
+    default_value:
+      'language-interface': 0
+  negotiation/language_url/enabled:
+    plugin: default_value
+    default_value:
+      'language-url': 0
+      'language-url-fallback': 1
+  negotiation/language_interface/enabled:
+    plugin: static_map
+    source: language_negotiation
+    map:
+      # LANGUAGE_NEGOTIATION_NONE = 0
+      # LANGUAGE_NEGOTIATION_PATH_DEFAULT = 1
+      # LANGUAGE_NEGOTIATION_PATH = 2
+      # LANGUAGE_NEGOTIATION_DOMAIN = 3
+      0:
+        'language-selected': 0
+      1:
+        'language-url': 0
+        'language-selected': 1
+      2:
+        'language-url': 0
+        'language-user': 1
+        'language-browser': 2
+        'language-selected': 3
+      3:
+        'language-url': 0
+        'language-selected': 1
+destination:
+  plugin: config
+  config_name: language.types
diff --git a/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php b/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php
index 3ddc293..aa70638 100644
--- a/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php
+++ b/core/modules/language/tests/src/Kernel/Migrate/d6/MigrateLanguageNegotiationSettingsTest.php
@@ -118,4 +118,92 @@ public function testLanguageDomains() {
     $this->assertSame($config->get('url.domains'), $expected_domains);
   }
 
+  /**
+   * Tests the migration of language types with default path prefix.
+   */
+  public function testLanguageTypesWithDefaultPathPrefix() {
+    $this->executeMigration('d6_language_types');
+
+    $config = $this->config('language.types');
+    $this->assertSame($config->get('all'), ['language_interface', 'language_content', 'language_url']);
+    $this->assertSame($config->get('configurable'), ['language_interface']);
+    $this->assertSame($config->get('negotiation.language_content.enabled'), ['language-interface' => 0]);
+    $this->assertSame($config->get('negotiation.language_url.enabled'), ['language-url' => 0, 'language-url-fallback' => 1]);
+    $expected = [
+      'language-url' => 0,
+      'language-selected' => 1,
+    ];
+    $this->assertSame($config->get('negotiation.language_interface.enabled'), $expected);
+  }
+
+  /**
+   * Tests the migration of language types with no negotiation.
+   */
+  public function testLanguageTypesWithNoNegotiation() {
+    $this->sourceDatabase->update('variable')
+      ->fields(array('value' => serialize(0)))
+      ->condition('name', 'language_negotiation')
+      ->execute();
+
+    $this->executeMigration('d6_language_types');
+
+    $config = $this->config('language.types');
+    $this->assertSame($config->get('all'), ['language_interface', 'language_content', 'language_url']);
+    $this->assertSame($config->get('configurable'), ['language_interface']);
+    $this->assertSame($config->get('negotiation.language_content.enabled'), ['language-interface' => 0]);
+    $this->assertSame($config->get('negotiation.language_url.enabled'), ['language-url' => 0, 'language-url-fallback' => 1]);
+    $expected = [
+      'language-selected' => 0,
+    ];
+    $this->assertSame($config->get('negotiation.language_interface.enabled'), $expected);
+  }
+
+  /**
+   * Tests the migration of language types with path prefix negotiation.
+   */
+  public function testLanguageTypesWithPathPrefix() {
+    $this->sourceDatabase->update('variable')
+      ->fields(array('value' => serialize(2)))
+      ->condition('name', 'language_negotiation')
+      ->execute();
+
+    $this->executeMigration('d6_language_types');
+
+    $config = $this->config('language.types');
+    $this->assertSame($config->get('all'), ['language_interface', 'language_content', 'language_url']);
+    $this->assertSame($config->get('configurable'), ['language_interface']);
+    $this->assertSame($config->get('negotiation.language_content.enabled'), ['language-interface' => 0]);
+    $this->assertSame($config->get('negotiation.language_url.enabled'), ['language-url' => 0, 'language-url-fallback' => 1]);
+    $expected = [
+      'language-url' => 0,
+      'language-user' => 1,
+      'language-browser' => 2,
+      'language-selected' => 3,
+    ];
+    $this->assertSame($config->get('negotiation.language_interface.enabled'), $expected);
+  }
+
+  /**
+   * Tests the migration of language types with domain negotiation.
+   */
+  public function testLanguageTypesWithDomain() {
+    $this->sourceDatabase->update('variable')
+      ->fields(array('value' => serialize(3)))
+      ->condition('name', 'language_negotiation')
+      ->execute();
+
+    $this->executeMigration('d6_language_types');
+
+    $config = $this->config('language.types');
+    $this->assertSame($config->get('all'), ['language_interface', 'language_content', 'language_url']);
+    $this->assertSame($config->get('configurable'), ['language_interface']);
+    $this->assertSame($config->get('negotiation.language_content.enabled'), ['language-interface' => 0]);
+    $this->assertSame($config->get('negotiation.language_url.enabled'), ['language-url' => 0, 'language-url-fallback' => 1]);
+    $expected = [
+      'language-url' => 0,
+      'language-selected' => 1,
+    ];
+    $this->assertSame($config->get('negotiation.language_interface.enabled'), $expected);
+  }
+
 }
diff --git a/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php b/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
index 13b9fa6..668e698 100644
--- a/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
+++ b/core/modules/migrate_drupal_ui/src/Form/MigrateUpgradeForm.php
@@ -290,6 +290,10 @@ class MigrateUpgradeForm extends ConfirmFormBase {
       'source_module' => 'locale',
       'destination_module' => 'language',
     ],
+    'd6_language_types' => [
+      'source_module' => 'locale',
+      'destination_module' => 'language',
+    ],
     'language' => [
       'source_module' => 'locale',
       'destination_module' => 'language',