diff --git a/h5p.classes.php b/h5p.classes.php
index 8ff35f8..e87bc79 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -2870,7 +2870,7 @@ class H5PContentValidator {
     }
 
     if (isset($file->copyright)) {
-      $this->validateGroup($file->copyright, H5PContentValidator::getCopyrightSemantics());
+      $this->validateGroup($file->copyright, $this->getCopyrightSemantics());
     }
   }
 
@@ -3373,40 +3373,40 @@ class H5PContentValidator {
     return $uri;
   }
 
-  public static function getCopyrightSemantics() {
+  public function getCopyrightSemantics() {
     static $semantics;
 
     if ($semantics === NULL) {
       $semantics = (object) array(
         'name' => 'copyright',
         'type' => 'group',
-        'label' => 'Copyright information',
+        'label' => $this->h5pF->t('Copyright information'),
         'fields' => array(
           (object) array(
             'name' => 'title',
             'type' => 'text',
-            'label' => 'Title',
+            'label' => $this->h5pF->t('Title'),
             'placeholder' => 'La Gioconda',
             'optional' => TRUE
           ),
           (object) array(
             'name' => 'author',
             'type' => 'text',
-            'label' => 'Author',
+            'label' => $this->h5pF->t('Author'),
             'placeholder' => 'Leonardo da Vinci',
             'optional' => TRUE
           ),
           (object) array(
             'name' => 'year',
             'type' => 'text',
-            'label' => 'Year(s)',
+            'label' => $this->h5pF->t('Year(s)'),
             'placeholder' => '1503 - 1517',
             'optional' => TRUE
           ),
           (object) array(
             'name' => 'source',
             'type' => 'text',
-            'label' => 'Source',
+            'label' => $this->h5pF->t('Source'),
             'placeholder' => 'http://en.wikipedia.org/wiki/Mona_Lisa',
             'optional' => true,
             'regexp' => (object) array(
@@ -3417,56 +3417,56 @@ class H5PContentValidator {
           (object) array(
             'name' => 'license',
             'type' => 'select',
-            'label' => 'License',
+            'label' => $this->h5pF->t('License'),
             'default' => 'U',
             'options' => array(
               (object) array(
                 'value' => 'U',
-                'label' => 'Undisclosed'
+                'label' => $this->h5pF->t('Undisclosed')
               ),
               (object) array(
                 'value' => 'CC BY',
-                'label' => 'Attribution'
+                'label' => $this->h5pF->t('Attribution')
               ),
               (object) array(
                 'value' => 'CC BY-SA',
-                'label' => 'Attribution-ShareAlike'
+                'label' => $this->h5pF->t('Attribution-ShareAlike')
               ),
               (object) array(
                 'value' => 'CC BY-ND',
-                'label' => 'Attribution-NoDerivs'
+                'label' => $this->h5pF->t('Attribution-NoDerivs')
               ),
               (object) array(
                 'value' => 'CC BY-NC',
-                'label' => 'Attribution-NonCommercial'
+                'label' => $this->h5pF->t('Attribution-NonCommercial')
               ),
               (object) array(
                 'value' => 'CC BY-NC-SA',
-                'label' => 'Attribution-NonCommercial-ShareAlike'
+                'label' => $this->h5pF->t('Attribution-NonCommercial-ShareAlike')
               ),
               (object) array(
                 'value' => 'CC BY-NC-ND',
-                'label' => 'Attribution-NonCommercial-NoDerivs'
+                'label' => $this->h5pF->t('Attribution-NonCommercial-NoDerivs')
               ),
               (object) array(
                 'value' => 'GNU GPL',
-                'label' => 'General Public License'
+                'label' => $this->h5pF->t('General Public License')
               ),
               (object) array(
                 'value' => 'PD',
-                'label' => 'Public Domain'
+                'label' => $this->h5pF->t('Public Domain')
               ),
               (object) array(
                 'value' => 'ODC PDDL',
-                'label' => 'Public Domain Dedication and Licence'
+                'label' => $this->h5pF->t('Public Domain Dedication and Licence')
               ),
               (object) array(
                 'value' => 'CC PDM',
-                'label' => 'Public Domain Mark'
+                'label' => $this->h5pF->t('Public Domain Mark')
               ),
               (object) array(
                 'value' => 'C',
-                'label' => 'Copyright'
+                'label' => $this->h5pF->t('Copyright')
               )
             )
           )