[Feature] Add language to parameters list

src/Transaction/ValueObject/Transaction.php

@@ -20,6 +20,7 @@
  *      "gatewayID",
  *      "currency",
  *      "customerEmail",
+ *      "language",
  *      "customerNRB",
  *      "taxCountry",
  *      "customerIP",
@@ -103,6 +104,14 @@ class Transaction extends AbstractValueObject implements SerializableInterface,
      */
     protected $customerEmail;
 
+    /**
+     * Selection of the language in which the content will be presented in the system.
+     *
+     * @var string
+     * @Type("string")
+     */
+    protected $language;
+
     /**
      * Transaction customer bank account number.
      *
@@ -346,6 +355,14 @@ public function getCustomerEmail(): string
         return $this->customerEmail;
     }
 
+    /**
+     * @return string
+     */
+    public function getLanguage(): string
+    {
+        return $this->language;
+    }
+
     /**
      * @return string
      */