diff --git a/certificates/index.php b/certificates/index.php
index a8f1944d42..f7bcc1892b 100755
--- a/certificates/index.php
+++ b/certificates/index.php
@@ -10,6 +10,24 @@ require_once '../main/inc/global.inc.php';
 $action = isset($_GET['action']) ? $_GET['action'] : null;
 $userId = isset($_GET['user_id']) ? $_GET['user_id'] : 0;
 
+$category = Category::findByCertificate($_GET['id']);
+
+// Check if the certificate should use the course language
+if (!empty($category) && !empty($category->get_course_code())) {
+    $courseInfo = api_get_course_info($category->get_course_code());
+    $language = $courseInfo['language'];
+
+    $languageFilesToLoad = api_get_language_files_to_load($language);
+
+    foreach ($languageFilesToLoad as $languageFile) {
+        include $languageFile;
+    }
+
+    // Overwrite the interface language with the course language
+    $language_interface = $language;
+    $language_interface_initial_value = $language_interface;
+}
+
 $certificate = new Certificate($_GET['id'], $userId);
 
 CustomCertificatePlugin::redirectCheck($certificate, $_GET['id'], $userId);
diff --git a/main/gradebook/lib/be/category.class.php b/main/gradebook/lib/be/category.class.php
index 735b51a831..33df764d12 100755
--- a/main/gradebook/lib/be/category.class.php
+++ b/main/gradebook/lib/be/category.class.php
@@ -2774,4 +2774,32 @@ class Category implements GradebookItem
 
         return api_float_val($categoryScore);
     }
+
+    /**
+     * Find a gradebook category by the certificate ID.
+     *
+     * @param int $id
+     *
+     * @return Category|null
+     * @throws \Doctrine\ORM\NonUniqueResultException
+     */
+    public static function findByCertificate($id)
+    {
+        $categoryId = Database::getManager()
+            ->createQuery("SELECT c.catId FROM ChamiloCoreBundle:GradebookCertificate c WHERE c.id = :id")
+            ->setParameters(['id' => $id])
+            ->getOneOrNullResult();
+
+        if (empty($categoryId)) {
+            return null;
+        }
+
+        $category = self::load($categoryId['catId']);
+
+        if (empty($category)) {
+            return $category;
+        }
+
+        return $category[0];
+    }
 }