diff --git a/src/bundle/Resources/translations/validators.en.xliff b/src/bundle/Resources/translations/validators.en.xliff
index 5bd0ae7b79..8ad4a705c0 100644
--- a/src/bundle/Resources/translations/validators.en.xliff
+++ b/src/bundle/Resources/translations/validators.en.xliff
@@ -77,8 +77,8 @@
         <note>key: ezplatform.trash.location_has_no_children</note>
       </trans-unit>
       <trans-unit id="ea852842b560d609441b8470b79735f2dc91698f" resname="ibexa.language.language_code.format">
-        <source>The Language code {{ value }} contains illegal characters. Language code should start with a letter, digit or underscore and only contain letters, digits, numbers, underscores ("_"), hyphens ("-") and colons (":").").</source>
-        <target state="new">The Language code {{ value }} contains illegal characters. Language code should start with a letter, digit or underscore and only contain letters, digits, numbers, underscores ("_"), hyphens ("-") and colons (":").").</target>
+        <source>The Language code {{ value }} contains illegal characters. Language code should start with a letter, digit or underscore and only contain letters, digits, numbers, underscores, hyphens and colons.</source>
+        <target state="new">The Language code {{ value }} contains illegal characters. Language code should start with a letter, digit or underscore and only contain letters, digits, numbers, underscores, hyphens and colons.</target>
         <note>key: ibexa.language.language_code.format</note>
       </trans-unit>
       <trans-unit id="cf558f546b83d94f1272929f81c64bd33d2997bc" resname="js.error.address_not_found">
diff --git a/src/lib/Form/Data/Language/LanguageCreateData.php b/src/lib/Form/Data/Language/LanguageCreateData.php
index 1e7cf0a311..0ba6bb049d 100644
--- a/src/lib/Form/Data/Language/LanguageCreateData.php
+++ b/src/lib/Form/Data/Language/LanguageCreateData.php
@@ -7,9 +7,11 @@
 
 namespace Ibexa\AdminUi\Form\Data\Language;
 
+use JMS\TranslationBundle\Model\Message;
+use JMS\TranslationBundle\Translation\TranslationContainerInterface;
 use Symfony\Component\Validator\Constraints as Assert;
 
-class LanguageCreateData
+class LanguageCreateData implements TranslationContainerInterface
 {
     /**
      * @var string
@@ -92,6 +94,16 @@ public function setEnabled(bool $enabled): self
 
         return $this;
     }
+
+    public static function getTranslationMessages(): array
+    {
+        return [
+            Message::create('ibexa.language.language_code.format', 'validators')
+                ->setDesc(
+                    'The Language code {{ value }} contains illegal characters. Language code should start with a letter, digit or underscore and only contain letters, digits, numbers, underscores, hyphens and colons.'
+                ),
+        ];
+    }
 }
 
 class_alias(LanguageCreateData::class, 'EzSystems\EzPlatformAdminUi\Form\Data\Language\LanguageCreateData');