diff --git a/README.md b/README.md
index 72a760f..aed0356 100755
--- a/README.md
+++ b/README.md
@@ -12,6 +12,14 @@ Install composer dependency
 composer require macopedia/akeneo-openai-translator
 ```
 
+register bundle in `config/bundles.php`
+
+```php
+return [
+    'Macopedia\Translator\MacopediaTranslatorBundle' => ['all' => true]
+];
+```
+
 define Open AI Key in `.env` file:
 
 ```dotenv
diff --git a/composer.json b/composer.json
index 78d4a7c..531d514 100755
--- a/composer.json
+++ b/composer.json
@@ -43,6 +43,9 @@
             "@cs:fix",
             "@phpstan",
             "@phpunit"
+        ],
+        "post-install-cmd": [
+            "make upgrade-front"
         ]
 
     },
diff --git a/src/Macopedia/Translator/Client/OpenAiClient.php b/src/Macopedia/Translator/Client/OpenAiClient.php
index c484c98..5ed3fb8 100644
--- a/src/Macopedia/Translator/Client/OpenAiClient.php
+++ b/src/Macopedia/Translator/Client/OpenAiClient.php
@@ -17,11 +17,10 @@ class OpenAiClient
     public function __construct(
         private LoggerInterface $logger,
         private string $model,
-        string $apiKey,
-        string $organization = null,
+        ?string $apiKey = '',
+        ?string $organization = null,
         private bool $logging = false
-    )
-    {
+    ) {
         $this->client = new OpenAi($apiKey);
         $this->client->listModels();
 
@@ -54,7 +53,7 @@ public function ask(string $role, string $content): ?Response
     }
 
 
-    #[ArrayShape(['model' => "string", 'messages' => "\string[][]"])]
+    #[ArrayShape(['model' => 'string', 'messages' => "\string[][]"])]
     private function generateMessage(string $role, string $content): array
     {
         return [
diff --git a/src/Macopedia/Translator/MacopediaTranslatorBundle.php b/src/Macopedia/Translator/MacopediaTranslatorBundle.php
index 1d18501..716ee02 100644
--- a/src/Macopedia/Translator/MacopediaTranslatorBundle.php
+++ b/src/Macopedia/Translator/MacopediaTranslatorBundle.php
@@ -8,4 +8,8 @@
 
 final class MacopediaTranslatorBundle extends Bundle
 {
+    public function getParent()
+    {
+        return null;
+    }
 }
diff --git a/src/Macopedia/Translator/Resources/config/services.yml b/src/Macopedia/Translator/Resources/config/services.yml
index c9c9c3f..2b8a65f 100644
--- a/src/Macopedia/Translator/Resources/config/services.yml
+++ b/src/Macopedia/Translator/Resources/config/services.yml
@@ -1,9 +1,11 @@
+parameters:
+  open_ai_key: env(default::OPEN_AI_KEY)
 services:
   Macopedia\Translator\Client\OpenAiClient:
     arguments:
       - '@logger'
       - 'gpt-3.5-turbo'
-      - '%env(OPEN_AI_KEY)%'
+      - '%open_ai_key%'
 
   Macopedia\Translator\Translator\OpenAiTranslator:
     arguments:
diff --git a/tests/Translator/LanguageTest.php b/tests/Translator/LanguageTest.php
new file mode 100644
index 0000000..49ed4ca
--- /dev/null
+++ b/tests/Translator/LanguageTest.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Translator;
+
+use InvalidArgumentException;
+use Macopedia\Translator\Translator\Language;
+use PHPUnit\Framework\TestCase;
+
+final class LanguageTest extends TestCase
+{
+    /**
+     * @dataProvider dataProvider
+     * @param string $code
+     * @param bool $correct
+     */
+    public function testCreateCorrectLanguage(string $code, bool $correct): void
+    {
+        if (!$correct) {
+            $this->expectException(InvalidArgumentException::class);
+        }
+
+        Language::fromCode($code);
+
+        if ($correct) {
+            $this->addToAssertionCount(1);
+        }
+    }
+
+    /**
+     * @return array<int, array<int, string|bool>>
+     */
+    public static function dataProvider(): array
+    {
+        return [
+            ['sg', true],
+            ['sa', true],
+            ['sc', true],
+            ['sr', true],
+            ['sn', true],
+            ['SN', false],
+            ['SR', false],
+            ['gb', false],
+            ['Pl', false],
+            ['pln', false],
+            ['pl_PL', false],
+        ];
+    }
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..637c614
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,3 @@
+<?php
+
+require dirname(__DIR__) . '/vendor/autoload.php';
\ No newline at end of file