diff --git a/documentation/default-languages.md b/documentation/default-languages.md
index b4309930..1bebf880 100644
--- a/documentation/default-languages.md
+++ b/documentation/default-languages.md
@@ -33,3 +33,24 @@ $language_resolver->getFallbackLangAttributes();
 $language_resolver->getCurrentLangAttributes();
 
 ```
+
+## Twig
+
+The current language object, the alternative language boolean and possible fallback language attributes are added to each template via `helfi_api_base_template_preprocess_default_variables_alter()`. 
+
+### Usage
+
+```twig
+{# Get the language ID or "langcode" #}
+{{ language.id }}
+
+{# Get the language human readable name #}
+{{ language.name }}
+
+{# Check for alternative language. (true|false) #}
+{{ alternative_language }}
+
+{# Get the alternative language fallback attributes. #}
+{% set lang = lang_attributes.fallback_lang %}
+{% set dir = lang_attributes.fallback_dir %}
+```
diff --git a/helfi_api_base.module b/helfi_api_base.module
index 74dd0924..178a1296 100644
--- a/helfi_api_base.module
+++ b/helfi_api_base.module
@@ -8,6 +8,7 @@
 declare(strict_types=1);
 
 use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Language\LanguageInterface;
 use Drupal\helfi_api_base\Features\FeatureManager;
 use Drupal\helfi_api_base\Link\LinkProcessor;
 use Drupal\helfi_api_base\UserExpire\UserExpireManager;
@@ -103,3 +104,22 @@ function helfi_api_base_cron() : void {
     $userExpireManager->cancelExpiredUsers();
   }
 }
+
+/**
+ * Implements hook_template_preprocess_default_variables_alter().
+ */
+function helfi_api_base_template_preprocess_default_variables_alter(array &$variables): void {
+  // Set the language object and alternative language attributes.
+  $variables['language'] = $language = Drupal::languageManager()
+    ->getCurrentLanguage(LanguageInterface::TYPE_CONTENT);
+
+  // Set alternative language fallback attributes.
+  $defaultLanguageResolver = Drupal::service('helfi_api_base.default_language_resolver');
+  $variables['alternative_language'] = $defaultLanguageResolver->isAltLanguage($language->getId());
+
+  if ($variables['alternative_language']) {
+    $attributes = $defaultLanguageResolver->getFallbackLangAttributes();
+    $variables['lang_attributes']['fallback_lang'] = $attributes['lang'];
+    $variables['lang_attributes']['fallback_dir'] = $attributes['dir'];
+  }
+}
diff --git a/src/Language/DefaultLanguageResolver.php b/src/Language/DefaultLanguageResolver.php
index 4b11c9b2..03cc46c0 100644
--- a/src/Language/DefaultLanguageResolver.php
+++ b/src/Language/DefaultLanguageResolver.php
@@ -48,7 +48,7 @@ public function getDefaultLanguages() : array {
    *
    * Non-default languages use this for certain elements.
    * Can be configured by overriding the
-   * 'helfi_api_base.fallback_language' parameter in servies.yml  file.
+   * 'helfi_api_base.fallback_language' parameter in services.yml  file.
    *
    * @return string
    *   The fallback language ID.
diff --git a/tests/src/Kernel/Language/DefaultLanguageVariablesTest.php b/tests/src/Kernel/Language/DefaultLanguageVariablesTest.php
new file mode 100644
index 00000000..31142243
--- /dev/null
+++ b/tests/src/Kernel/Language/DefaultLanguageVariablesTest.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\helfi_api_base\Kernel\Language;
+
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * Tests helfi_api_base_template_preprocess_default_variables_alter().
+ *
+ * @group helfi_api_base
+ */
+class DefaultLanguageVariablesTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'helfi_api_base',
+  ];
+
+  /**
+   * Test helfi_api_base_template_preprocess_default_variables_alter().
+   */
+  public function testDefaultLanguageVariables(): void {
+    // Prepare variables for the page template.
+    $render_array = [
+      '#theme' => 'page',
+      '#content' => ['#markup' => 'Test content'],
+    ];
+    \Drupal::moduleHandler()->alter('template_preprocess_default_variables', $render_array);
+    \Drupal::moduleHandler()->invokeAll('preprocess_page', [&$render_array]);
+
+    // Check if variables are set correctly.
+    $this->assertInstanceOf('Drupal\Core\Language\Language', $render_array['language']);
+    $this->assertNotNull($render_array['alternative_language']);
+  }
+
+}
diff --git a/tests/src/Unit/ApiClient/ApiClientTest.php b/tests/src/Unit/ApiClient/ApiClientTest.php
index 6df26736..b01d2a3a 100644
--- a/tests/src/Unit/ApiClient/ApiClientTest.php
+++ b/tests/src/Unit/ApiClient/ApiClientTest.php
@@ -67,7 +67,8 @@ protected function setUp() : void {
     parent::setUp();
 
     $this->fixture = sprintf('%s/../../../fixtures/response.json', __DIR__);
-    $this->cache = new MemoryBackend();
+    $time = $this->prophesize(TimeInterface::class)->reveal();
+    $this->cache = new MemoryBackend($time);
   }
 
   /**