diff --git a/mailpoet/lib/Config/Renderer.php b/mailpoet/lib/Config/Renderer.php
index 22605a739b..f53c673007 100644
--- a/mailpoet/lib/Config/Renderer.php
+++ b/mailpoet/lib/Config/Renderer.php
@@ -3,6 +3,7 @@
 namespace MailPoet\Config;
 
 use MailPoet\Twig;
+use MailPoet\WP\Functions as WPFunctions;
 use MailPoetVendor\Twig\Extension\DebugExtension;
 use MailPoetVendor\Twig\Lexer as TwigLexer;
 use MailPoetVendor\Twig\Loader\FilesystemLoader as TwigFileSystem;
@@ -78,7 +79,8 @@ class Renderer {
       'assets_url' => Env::$assetsUrl,
       'assets_manifest_js' => $this->assetsManifestJs,
       'assets_manifest_css' => $this->assetsManifestCss,
-    ]));
+    ],
+      WPFunctions::get()));
   }
 
   public function setupSyntax() {
diff --git a/mailpoet/lib/Twig/Assets.php b/mailpoet/lib/Twig/Assets.php
index 295a397415..cb99587ea2 100644
--- a/mailpoet/lib/Twig/Assets.php
+++ b/mailpoet/lib/Twig/Assets.php
@@ -12,14 +12,19 @@ use MailPoetVendor\Twig\TwigFunction;
 class Assets extends AbstractExtension {
   private $globals;
 
+  /** @var WPFunctions  */
+  private $wp;
+
   /** @var CdnAssetUrl|null */
   private $cdnAssetsUrl;
 
   public function __construct(
     array $globals,
+    WPFunctions $wp,
     CdnAssetUrl $cdnAssetsUrl = null
   ) {
     $this->globals = $globals;
+    $this->wp = $wp;
     $this->cdnAssetsUrl = $cdnAssetsUrl;
   }
 
@@ -50,6 +55,11 @@ class Assets extends AbstractExtension {
         [$this, 'generateCdnUrl'],
         ['is_safe' => ['all']]
       ),
+      new TwigFunction(
+        'language',
+        [$this, 'language'],
+        ['is_safe' => ['all']]
+      ),
     ];
   }
 
@@ -68,6 +78,10 @@ class Assets extends AbstractExtension {
     return join("\n", $output);
   }
 
+  public function language() {
+    return $this->wp->getBlogInfo('language');
+  }
+
   public function generateJavascript() {
     $scripts = func_get_args();
     $output = [];
diff --git a/mailpoet/tests/integration/Twig/AssetsTest.php b/mailpoet/tests/integration/Twig/AssetsTest.php
index db23b172d1..092fb5916f 100644
--- a/mailpoet/tests/integration/Twig/AssetsTest.php
+++ b/mailpoet/tests/integration/Twig/AssetsTest.php
@@ -5,6 +5,7 @@ namespace MailPoet\Test\Twig;
 use MailPoet\Config\Env;
 use MailPoet\Twig\Assets;
 use MailPoet\Util\CdnAssetUrl;
+use MailPoet\WP\Functions as WPFunctions;
 
 class AssetsTest extends \MailPoetTest {
   public $assetsExtension;
@@ -22,6 +23,7 @@ class AssetsTest extends \MailPoetTest {
         'assets_manifest_css' => false,
         'version' => $this->version,
       ],
+      WPFunctions::get(),
       new CdnAssetUrl('')
     );
   }
@@ -38,6 +40,7 @@ class AssetsTest extends \MailPoetTest {
         'assets_manifest_js' => $manifest,
         'version' => $this->version,
       ],
+      WPFunctions::get(),
       new CdnAssetUrl('')
     );
 
@@ -76,6 +79,7 @@ class AssetsTest extends \MailPoetTest {
         'assets_manifest_css' => $manifest,
         'version' => $this->version,
       ],
+      WPFunctions::get(),
       new CdnAssetUrl('')
     );