title: AWS Translate Php sdk missing field but not request in documentation
body: <p>I am having an unusual problem with aws sdk on the AWS Translate service.</p>
  <p>I need to dynamically translate some response messages, but I get this error.</p>
  <pre><code>$currentLanguage = 'es';
  // If the TargetLanguageCode is not &quot;en&quot;, the SourceLanguageCode must be &quot;en&quot;.
  $targetLanguage= 'en';
  $textToTranslate = 'El AWS SDK for PHP versión 3 permite a los desarrolladores de PHP utilizar Amazon Web Services en su código PHP y crear aplicaciones y software robustos utilizando servicios como Amazon S3, Amazon DynamoDB, Amazon Glacier, etc. Puede empezar rápidamente instalando el SDK mediante Composer (solicitando el paquete aws/aws-sdk-php) o descargando el archivo aws.zip o aws.phar independiente';
  try {
  $translate = $this-&gt;aws_utils-&gt;getTranslate();
  $result = $translate-&gt;translateText(array(
  'SourceLanguageCode' =&gt; $currentLanguage,
  'TargetLanguageCode' =&gt; $targetLanguage,
  'Text' =&gt; $textToTranslate
  ));
  }catch (AwsException $e) {
  // output error message if fails
  var_dump($e-&gt;getMessage());die;
  }
  </code></pre>
  <p><a href="https://docs.aws.amazon.com/translate/latest/dg/API_TranslateText.html" rel="nofollow noreferrer">https://docs.aws.amazon.com/translate/latest/dg/API_TranslateText.html</a></p>
  <p>As per the documentation I pass the parameters to the SDK service correctly but I get this error 500:
  Found 1 error while validating the input provided for the TranslateText operation:
  [TranslatedText] is missing and is a required parameter</p>
  <p>Does anyone know the problem? That field shouldn't be there completely</p>