diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6dddac6..701a5e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+3.3.0
+=====
+
+* (feature) Add user-readable error message in `ApiResponse`.
+
+
 3.2.2
 =====
 
diff --git a/src/Api/ApiResponse.php b/src/Api/ApiResponse.php
index 128141c..594e597 100644
--- a/src/Api/ApiResponse.php
+++ b/src/Api/ApiResponse.php
@@ -2,10 +2,13 @@
 
 namespace Torr\Rad\Api;
 
+use Symfony\Component\Translation\TranslatableMessage;
+
 class ApiResponse
 {
 	public int $statusCode;
 	public ?string $error = null;
+	public TranslatableMessage|string|null $errorMessage = null;
 
 	/**
 	 */
@@ -48,11 +51,18 @@ public function withStatusCode (int $statusCode) : self
 	}
 
 	/**
+	 * @param string|null $error        An error code
+	 * @param string|null $errorMessage A user-readable error message
+	 *
 	 * @return $this
 	 */
-	public function withError (?string $error) : self
+	public function withError (
+		?string $error,
+		TranslatableMessage|string|null $errorMessage = null,
+	) : self
 	{
 		$this->error = $error;
+		$this->errorMessage = $errorMessage;
 
 		return $this;
 	}
@@ -64,4 +74,13 @@ public function isOk () : bool
 	{
 		return $this->statusCode >= 200 && $this->statusCode <= 299;
 	}
+
+	/**
+	 * Sghort
+	 */
+	public static function error (string $errorMessage, int $statusCode = 400) : self
+	{
+		return (new self($statusCode))
+			->withError($errorMessage);
+	}
 }
diff --git a/src/Api/ApiResponseNormalizer.php b/src/Api/ApiResponseNormalizer.php
index e418e8b..1a4e461 100644
--- a/src/Api/ApiResponseNormalizer.php
+++ b/src/Api/ApiResponseNormalizer.php
@@ -2,8 +2,17 @@
 
 namespace Torr\Rad\Api;
 
+use Symfony\Component\Translation\TranslatableMessage;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
 final class ApiResponseNormalizer
 {
+	/**
+	 */
+	public function __construct (
+		private readonly TranslatorInterface $translator,
+	) {}
+
 	/**
 	 * Normalizes the given API response
 	 *
@@ -16,6 +25,9 @@ public function normalize (ApiResponse $apiResponse) : array
 				"ok" => $apiResponse->isOk(),
 				"data" => $apiResponse->data,
 				"error" => $apiResponse->error,
+				"errorMessage" => $apiResponse->errorMessage instanceof TranslatableMessage
+					? $apiResponse->errorMessage->trans($this->translator)
+					: $apiResponse->errorMessage,
 			],
 			static fn (mixed $value) => null !== $value,
 		);
diff --git a/src/Form/FormErrorNormalizer.php b/src/Form/FormErrorNormalizer.php
index d5a6584..e648c4f 100644
--- a/src/Form/FormErrorNormalizer.php
+++ b/src/Form/FormErrorNormalizer.php
@@ -29,7 +29,7 @@ private function normalizeNested (array &$errors, FormInterface $parent, string
 	{
 		if (null === $this->translator)
 		{
-			throw new MissingOptionalDependencyException("symfony/translator");
+			throw new MissingOptionalDependencyException("symfony/translation");
 		}
 
 		foreach ($parent->all() as $child)
diff --git a/tests/Api/ApiResponseNormalizerTest.php b/tests/Api/ApiResponseNormalizerTest.php
index 0b56076..06b56a4 100644
--- a/tests/Api/ApiResponseNormalizerTest.php
+++ b/tests/Api/ApiResponseNormalizerTest.php
@@ -3,6 +3,7 @@
 namespace Tests\Torr\Rad\Api;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Translation\Translator;
 use Torr\Rad\Api\ApiResponse;
 use Torr\Rad\Api\ApiResponseNormalizer;
 
@@ -17,7 +18,7 @@ final class ApiResponseNormalizerTest extends TestCase
 	public function testMinimal () : void
 	{
 		$apiResponse = new ApiResponse(400);
-		$normalizer = new ApiResponseNormalizer();
+		$normalizer = new ApiResponseNormalizer(new Translator("de"));
 
 		self::assertSame([
 			"ok" => false,
@@ -33,13 +34,14 @@ public function testMaximal () : void
 			200,
 			["o" => "hai"],
 		))
-			->withError("error message");
-		$normalizer = new ApiResponseNormalizer();
+			->withError("error code", "error message");
+		$normalizer = new ApiResponseNormalizer(new Translator("de"));
 
 		self::assertSame([
 			"ok" => true,
 			"data" => ["o" => "hai"],
-			"error" => "error message",
+			"error" => "error code",
+			"errorMessage" => "error message",
 		], $normalizer->normalize($apiResponse));
 	}
 }
diff --git a/tests/Listener/ControllerResponseListenerTest.php b/tests/Listener/ControllerResponseListenerTest.php
index e97faaf..aea6399 100644
--- a/tests/Listener/ControllerResponseListenerTest.php
+++ b/tests/Listener/ControllerResponseListenerTest.php
@@ -8,6 +8,7 @@
 use Symfony\Component\HttpKernel\Event\ViewEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Translation\Translator;
 use Torr\Rad\Api\ApiResponse;
 use Torr\Rad\Api\ApiResponseNormalizer;
 use Torr\Rad\Listener\ControllerResponseListener;
@@ -24,7 +25,7 @@ public function testIntegration () : void
 	{
 		$event = $this->createEvent(new ApiResponse(200));
 
-		$listener = new ControllerResponseListener(new ApiResponseNormalizer());
+		$listener = new ControllerResponseListener(new ApiResponseNormalizer(new Translator("de")));
 		$listener->onView($event);
 
 		self::assertInstanceOf(JsonResponse::class, $event->getResponse());
@@ -37,7 +38,7 @@ public function testIntegrationWithOtherResult () : void
 	{
 		$event = $this->createEvent(11);
 
-		$listener = new ControllerResponseListener(new ApiResponseNormalizer());
+		$listener = new ControllerResponseListener(new ApiResponseNormalizer(new Translator("de")));
 		$listener->onView($event);
 
 		self::assertNull($event->getResponse());
@@ -60,7 +61,7 @@ public function testStatusCode (int $expectedStatusCode, ApiResponse $apiRespons
 	{
 		$event = $this->createEvent($apiResponse);
 
-		$listener = new ControllerResponseListener(new ApiResponseNormalizer());
+		$listener = new ControllerResponseListener(new ApiResponseNormalizer(new Translator("de")));
 		$listener->onView($event);
 
 		$response = $event->getResponse();