walletservice/resources/lang/en/notifications.php

<?php
return [
    "group_validation_request" => ":name has sent you a group validation request",
    "accepted_group_validation_request" => ":name has accepted your group validation request",
    "group_deleting_request" => ":name has sent you a group deleting request",
    "accepted_group_deleting_request" => ":name has accepted your group deleting request",
    "refused_group_validation_request" => ":name has refused your group validation request",
    "refused_group_deleting_request" => ":name has refused your group deleting request",
];