diff --git a/src/BaseClient.php b/src/BaseClient.php
index ab89b9d..36b15c9 100644
--- a/src/BaseClient.php
+++ b/src/BaseClient.php
@@ -423,6 +423,11 @@ private function prepareAndExecuteRequest(string $method, string $url, array $op
             'Authorization' => sprintf('Bearer %s', $this->accessToken->getToken()),
         ];
 
+        // pass through Accept-Language header
+        if (!empty($options['language'])) {
+            $httpOptions['headers']['Accept-Language'] = $options['language'];
+        }
+
         // encode the body if a model is supplied for it
         if (isset($options['body']) && $options['body'] instanceof AbstractModel) {
             $httpOptions['headers']['Content-Type'] = $options['consumes'] ?? static::API_CONTENT_TYPE_FALLBACK;
diff --git a/src/Client.php b/src/Client.php
index 1534bf3..f984db0 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -105,6 +105,7 @@ public function getCatalogProduct(string $ean, ?string $AcceptLanguage = null):
         $url = "retailer/content/catalog-products/{$ean}";
         $options = [
             'produces' => 'application/vnd.retailer.v10+json',
+            'language' => $AcceptLanguage,
         ];
         $responseTypes = [
             '200' => Model\CatalogProduct::class,
@@ -280,6 +281,7 @@ public function getProductRanks(string $ean, string $date, ?Enum\GetProductRanks
                 'page' => $page,
             ],
             'produces' => 'application/vnd.retailer.v10+json',
+            'language' => $AcceptLanguage,
         ];
         $responseTypes = [
             '200' => Model\ProductRanks::class,
@@ -831,6 +833,7 @@ public function getProductList(Model\ProductListRequest $productListRequest, ?st
             'body' => $productListRequest,
             'produces' => 'application/vnd.retailer.v10+json',
             'consumes' => 'application/json',
+            'language' => $AcceptLanguage,
         ];
         $responseTypes = [
             '200' => Model\ProductListResponse::class,
@@ -864,6 +867,7 @@ public function getProductListFilters(?Enum\GetProductListFiltersCountryCode $co
                 'category-id' => $categoryId,
             ],
             'produces' => 'application/vnd.retailer.v10+json',
+            'language' => $AcceptLanguage,
         ];
         $responseTypes = [
             '200' => Model\ProductListFiltersResponse::class,
@@ -958,6 +962,7 @@ public function getProductPlacement(string $ean, ?Enum\GetProductPlacementCountr
                 'country-code' => $countryCode?->value,
             ],
             'produces' => 'application/vnd.retailer.v10+json',
+            'language' => $AcceptLanguage,
         ];
         $responseTypes = [
             '200' => Model\ProductPlacementResponse::class,
diff --git a/src/OpenApi/ClientGenerator.php b/src/OpenApi/ClientGenerator.php
index cd59794..e2e1e12 100644
--- a/src/OpenApi/ClientGenerator.php
+++ b/src/OpenApi/ClientGenerator.php
@@ -64,6 +64,27 @@ public function generateClient()
         file_put_contents(__DIR__ . '/../Client.php', implode("\n", $code));
     }
 
+
+    /**
+     * @param array $methodDefinition
+     * @param string $parameterName;
+     * @return array|null
+     */
+    public function findMethodDefinitionParameter(array $methodDefinition, string $parameterName): array|null
+    {
+        if (empty($methodDefinition['parameters'])) {
+            return null;
+        }
+
+        foreach ($methodDefinition['parameters'] as $parameter) {
+            if ($parameter['name'] === $parameterName) {
+                return $parameter;
+            }
+        }
+
+        return null;
+    }
+
     protected function generateMethod(string $path, string $httpMethod, array &$code): void
     {
         $methodDefinition = $this->specs['paths'][$path][$httpMethod];
@@ -122,6 +143,12 @@ protected function generateMethod(string $path, string $httpMethod, array &$code
         $code[] = '        ];';
         $options = '$options';
 
+        $acceptLanguage = $this->findMethodDefinitionParameter($methodDefinition, 'Accept-Language');
+
+        if ($acceptLanguage !== null) {
+            $code[] = sprintf('            \'language\' => %s,', '$AcceptLanguage');
+        }
+
         $this->addResponseTypes($methodDefinition['responses'], $code);
 
         $code[] = '';