diff --git a/behat.yml.dist b/behat.yml.dist
index 2fe7945..ec2342d 100644
--- a/behat.yml.dist
+++ b/behat.yml.dist
@@ -6,6 +6,7 @@ default:
       contexts:
         - Drupal\DrupalExtension\Context\MinkContext
         - Drupal\DrupalExtension\Context\DrupalContext
+        - Drupal\DrupalExtension\Context\MessageContext
         - Drupal\Tests\oe_multilingual\Behat\DrupalContext
         - Drupal\Tests\oe_multilingual\Behat\MinkContext
   extensions:
@@ -18,6 +19,8 @@ default:
       api_driver: "drupal"
       drupal:
         drupal_root: "build"
+      selectors: &drupal-selectors
+        success_message_selector: ".messages--status"
       region_map:
         "language switcher": "#block-oe-multilingual-language-switcher"
         "language dialog": "#block-oe-multilingual-language-switcher"
diff --git a/composer.json b/composer.json
index ff1eca4..51df969 100644
--- a/composer.json
+++ b/composer.json
@@ -22,8 +22,9 @@
         "drush/drush": "~9.0@stable",
         "openeuropa/code-review": "^1.0.0-alpha4",
         "openeuropa/drupal-core-require-dev": "^8.6",
-        "openeuropa/task-runner": "~1.0",
-        "phpunit/phpunit": "~6.0"
+        "openeuropa/task-runner": "~1.0.0-beta2",
+        "phpunit/phpunit": "~6.0",
+        "symfony/browser-kit": "~3.0||~4.0"
     },
     "scripts": {
         "post-install-cmd": "./vendor/bin/run drupal:site-setup",
diff --git a/oe_multilingual.services.yml b/oe_multilingual.services.yml
index 2e8c606..2499079 100644
--- a/oe_multilingual.services.yml
+++ b/oe_multilingual.services.yml
@@ -5,3 +5,7 @@ services:
   oe_multilingual.helper:
     class: Drupal\oe_multilingual\MultilingualHelper
     arguments: ['@entity.repository', '@current_route_match', '@language_manager']
+  oe_multilingual.content_language_settings:
+    class: Drupal\oe_multilingual\MultilingualConfigOverride
+    tags:
+      - {name: config.factory.override, priority: 5}
diff --git a/src/MultilingualConfigOverride.php b/src/MultilingualConfigOverride.php
new file mode 100644
index 0000000..d5289da
--- /dev/null
+++ b/src/MultilingualConfigOverride.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Drupal\oe_multilingual;
+
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\Core\Config\ConfigFactoryOverrideInterface;
+use Drupal\Core\Config\StorageInterface;
+use Drupal\Core\Config\StorableConfigBase;
+
+/**
+ * Override configuration values related to multilingual elements.
+ */
+class MultilingualConfigOverride implements ConfigFactoryOverrideInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function loadOverrides($names): array {
+    $overrides = [];
+    foreach ($names as $config_name) {
+      // Force the default site's language as the default language and prevent
+      // the users from changing it when creating a node.
+      if (strpos($config_name, 'language.content_settings.node.') !== FALSE) {
+        $overrides[$config_name] = [
+          'default_langcode' => 'site_default',
+          'language_alterable' => FALSE,
+        ];
+      }
+    }
+
+    return $overrides;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function createConfigObject($name, $collection = StorageInterface::DEFAULT_COLLECTION): ?StorableConfigBase {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheSuffix(): string {
+    return 'oe_multilingual.language_configs_override';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheableMetadata($name): CacheableMetadata {
+    return new CacheableMetadata();
+  }
+
+}
diff --git a/tests/Behat/DrupalContext.php b/tests/Behat/DrupalContext.php
index be1c7a1..e5c3d21 100644
--- a/tests/Behat/DrupalContext.php
+++ b/tests/Behat/DrupalContext.php
@@ -201,4 +201,59 @@ protected function getLanguageIdByName(string $name): string {
     throw new \InvalidArgumentException("Language '{$name}' not found.");
   }
 
+  /**
+   * Redirect user to the node creation page.
+   *
+   * @param string $content_type_name
+   *   Content type name.
+   *
+   * @Given I visit the :content_type_name creation page
+   */
+  public function iAmVisitingTheCreationPage(string $content_type_name): void {
+    $node_bundle = $this->getEntityTypeByLabel($content_type_name);
+    $this->visitPath('node/add/' . $node_bundle);
+  }
+
+  /**
+   * Check that the field is not present.
+   *
+   * @param string $field
+   *   Input id, name or label.
+   *
+   * @Then I should not see the field :field
+   */
+  public function iShouldNotSeeTheField(string $field): void {
+    $element = $this->getSession()
+      ->getPage()
+      ->findField($field);
+    if ($element) {
+      throw new \RuntimeException("Field '{$field}' is present.");
+    }
+  }
+
+  /**
+   * Check that we have the correct language for initial translation.
+   *
+   * @param string $title
+   *   Title of node.
+   *
+   * @Then The only available translation for :title is in the site's default language
+   */
+  public function assertOnlyDefaultLanguageTranslationExist(string $title): void {
+    $node = $this->getEntityByLabel('node', $title);
+    if (!$node) {
+      throw new \RuntimeException("Node '{$title}' doesn't exist.");
+    }
+
+    $node_translation_languages = $node->getTranslationLanguages();
+    if (count($node_translation_languages) !== 1) {
+      throw new \RuntimeException("The node should have only one translation.");
+    }
+
+    $node_language = key($node_translation_languages);
+    if ($node_language != \Drupal::languageManager()->getDefaultLanguage()->getId()) {
+      throw new \RuntimeException("Original translation language of the '{$title}' node is not the site's default language.");
+    }
+  }
+
 }
diff --git a/tests/features/content-default-language.feature b/tests/features/content-default-language.feature
new file mode 100644
index 0000000..2e93e94
--- /dev/null
+++ b/tests/features/content-default-language.feature
@@ -0,0 +1,17 @@
+@api
+Feature: Content initial language.
+  In order to create content
+  As a editor
+  I want to make sure that it is not possible for a content editor to create a node's initial version in any language
+  other than the site's default language
+
+  Scenario: As an editor, when I create a node I can not select the initial node language
+    Given I am logged in as a user with the "create oe_demo_translatable_page content" permission
+    And I visit the "Demo translatable page" creation page
+    Then I should not see the field "Language"
+
+    When I fill in "Title" with "Title Default value"
+    And I fill in "Body" with "Body Default value"
+    And I press "Save"
+    Then I should see the success message "Demo translatable page Title Default value has been created."
+    And The only available translation for "Title Default value" is in the site's default language