diff --git a/Classes/Controller/AbstractEIDController.php b/Classes/Controller/AbstractEIDController.php
index a26c713..d46c49b 100644
--- a/Classes/Controller/AbstractEIDController.php
+++ b/Classes/Controller/AbstractEIDController.php
@@ -19,6 +19,7 @@ use Psr\Http\Message\ServerRequestInterface;
 use TYPO3\CMS\Core\Cache\CacheManager;
 use TYPO3\CMS\Core\Database\ConnectionPool;
 use TYPO3\CMS\Core\Database\Query\Restriction\DefaultRestrictionContainer;
+use TYPO3\CMS\Core\Localization\LanguageService;
 use TYPO3\CMS\Core\Log\LogManager;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
@@ -88,6 +89,16 @@ class AbstractEIDController
      */
     protected $importLogger = null;
 
+    /**
+     * uriMapping
+     */
+    protected $uriMapping = null;
+
+    /**
+     * uriMappingValues
+     */
+    protected $uriMappingValues = [];
+
 
     /*
      * returns the extensionkey set in the exended calss
@@ -189,6 +200,8 @@ class AbstractEIDController
             0,
             true
         );
+        $GLOBALS['LANG'] = GeneralUtility::makeInstance(LanguageService::class);
+        $GLOBALS['LANG']->init('default');
         $GLOBALS['TSFE'] = $frontendController;
         $frontendController->connectToDB();
         $frontendController->fe_user = EidUtility::initFeUser();
@@ -219,15 +232,44 @@ class AbstractEIDController
             return $response->withStatus(404);
         }
         $httpMethod = strtolower($request->getMethod());
-        if ($apiObjectId) {
-            $requestMethod = $httpMethod
-                . ucfirst($apiObject)
-                . 'SingleRequest';
-            $request->apiObjectId = $apiObjectId;
+        if ($this->uriMapping) {
+            $uriParts = explode('/', $request->getUri()->getPath());
+            $uriParts = array_slice($uriParts, 3);
+            foreach ($this->uriMapping[$httpMethod] as $mapping => $function) {
+                $mappingParts = explode('/', $mapping);
+                $mappingParts = array_slice($mappingParts, 1);
+                $max = max(count($mappingParts), count($uriParts));
+                $mappingMatching = true;
+                for ($i = 0; $i < $max; $i++) {
+                    if ($uriParts[$i] == $mappingParts[$i]) {
+                        continue;
+                    }
+                    if (
+                        $uriParts[$i]
+                        && substr($mappingParts[$i], 0, 1) == '{'
+                        && substr($mappingParts[$i], -1, 1) == '}'
+                    ) {
+                        $mappingKey = substr($mappingParts[$i], 1, -1);
+                        $this->uriMappingValues[$mappingKey] = $uriParts[$i];
+                        continue;
+                    }
+                    $mappingMatching = false;
+                }
+                if ($mappingMatching == true) {
+                    $requestMethod = $function . 'Request';
+                }
+            }
         } else {
-            $requestMethod = $httpMethod
-                . ucfirst($apiObject)
-                . 'Request';
+            if ($apiObjectId) {
+                $requestMethod = $httpMethod
+                    . ucfirst($apiObject)
+                    . 'SingleRequest';
+                $request->apiObjectId = $apiObjectId;
+            } else {
+                $requestMethod = $httpMethod
+                    . ucfirst($apiObject)
+                    . 'Request';
+            }
         }
         if (method_exists($this, $requestMethod)) {
             $responseData = $this->$requestMethod($request, $response);
diff --git a/Classes/Traits/ValidationTrait.php b/Classes/Traits/ValidationTrait.php
index 8eda541..c2d984a 100644
--- a/Classes/Traits/ValidationTrait.php
+++ b/Classes/Traits/ValidationTrait.php
@@ -119,8 +119,9 @@ trait ValidationTrait
      * @param schema
      * @return void
      */
-    protected function validateAgainstSchema($input, $schema)
-    {
+    protected function validateAgainstSchema(
+        $input, $schema, $translate = false
+    ) {
         $validator = new Validator();
         $input = ArrayUtility::removeEmptyStrings($input);
         if (is_array($input) && array_key_exists('eID', $input)) {
@@ -141,6 +142,7 @@ trait ValidationTrait
             json_encode($schema),
             -1
         );
+
         if (!$validationResult->isValid()) {
             $this->isValid = false;
             $this->responseStatus = [400 => 'validationError'];
@@ -166,6 +168,9 @@ trait ValidationTrait
                     ];
                 }
             }
+            if ($translate) {
+                $this->translateErrorMessages($validationResult);
+            }
         }
         return $validationResult;
     }
@@ -213,7 +218,8 @@ trait ValidationTrait
         $translation = LocalizationUtility::translate(
             $key,
             $this->getExtensionKey(),
-            $arguments
+            $arguments,
+            'de'
         );
         if ($translation) {
             return $translation;
@@ -229,5 +235,97 @@ trait ValidationTrait
         return null;
     }
 
+    /**
+     * translate error messages to user readable strings
+     */
+    protected function translateErrorMessages($validationResult)
+    {
+        foreach ($validationResult->getErrors() as $error){
+            $errorLabel = null;
+            $field = implode('.', $error->dataPointer());
+            if ($error->keyword() == 'required') {
+                $tmp = $error->dataPointer();
+                array_push($tmp, $error->keywordArgs()['missing']);
+                $field = implode('.', $tmp);
+            }
+            if ($error->keyword() == 'additionalProperties') {
+                continue;
+            }
+            switch ($error->keyword()) {
+            case 'required':
+                $errorLabel = $this->getTranslation(
+                    'error.' . $field . '.required'
+                );
+                if ($errorLabel == null) {
+                    $fieldLabel = $this->getTranslation(
+                        'field.' . $field
+                    );
+                    $errorLabel = $this->getTranslation(
+                        'error.required', [$fieldLabel]
+                    );
+                }
+                if ($errorLabel == null) {
+                    $errorLabel = 'error.'
+                        . $field
+                        . '.'
+                        . $error->keyword();
+                }
+                $this->errorLabels[$field] = $errorLabel;
+                break;
+            case 'pattern':
+                $errorLabel = $this->getTranslation(
+                    'error.' . $field . '.pattern'
+                );
+                if ($errorLabel == null) {
+                    $fieldLabel = $this->getTranslation(
+                        'field.' . $field
+                    );
+                    $errorLabel = $this->getTranslation(
+                        'error.pattern', [$fieldLabel]
+                    );
+                }
+                if ($errorLabel == null) {
+                    $errorLabel = 'error.'
+                        . $field
+                        . '.'
+                        . $error->keyword();
+                }
+                $this->errorLabels[$field] = $errorLabel;
+                break;
+            case 'format':
+                $errorLabel = $this->getTranslation(
+                    'error.' . $field . '.format'
+                );
+                if ($errorLabel == null) {
+                    $fieldLabel = $this->getTranslation(
+                        'field.' . $field
+                    );
+                    $errorLabel = $this->getTranslation(
+                        'error.format', [$fieldLabel]
+                    );
+                }
+                if ($errorLabel == null) {
+                    $errorLabel = 'error.'
+                        . $field
+                        . '.'
+                        . $error->keyword();
+                }
+                $this->errorLabels[$field] = $errorLabel;
+                break;
+            default:
+                $errorLabel = $this->getTranslation(
+                    'error.' . $field . '.' . $error->keyword()
+                );
+                if ($errorLabel == null) {
+                    $errorLabel = 'error.'
+                        . $field
+                        . '.'
+                        . $error->keyword();
+                }
+                $this->errorLabels[$field] = $errorLabel;
+                break;
+            }
+        }
+    }
 
 }