wi-owncloud/lang/en/validation.php

<?php

return [
    'attributes' => [
        'firstname' => 'Vorname',
        'username' => 'OwnCloud Nutzername',
        'lastname' => 'Nachname',
        'email' => 'E-Mail-Adresse',
        'group' => 'Stamm',
        'function' => 'Funktion',
    ],
];