get translations from settings, not core

settings/ajax/changegroupname.php

@@ -4,13 +4,13 @@ OCP\JSON::callCheck();
 OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAdminUser();
 
-$l=OC_L10N::get('core');
+$l=OC_L10N::get('settings');
 
 $groupname = $_POST["groupname"];
 
 // Return Success story
 // TODO : make changes to the API to allow this.
-// setGroupname doesnt exist yet.	
+// setGroupname doesnt exist yet.
 if(OC_Group::setGroupname($groupname)) {
 	OCP\JSON::success(
 		array("data" => array(

settings/ajax/creategroup.php

@@ -4,7 +4,7 @@ OCP\JSON::callCheck();
 OC_JSON::checkAdminUser();
 
 $groupname = $_POST["groupname"];
-$l = OC_L10N::get('core');
+$l = OC_L10N::get('settings');
 
 // Does the group exist?
 if( in_array( $groupname, OC_Group::getGroups())) {