public/partials/user/settings-account.html
<h3 class="top30" translate>Notifications parameters</h3>
<div class="top15 form-group col-md-12">
<input type="checkbox" id="notify_approvals" ng-model="user.roles.account.notify.approvals" />
<label for="notify_approvals" translate>Notify me when a request is accepted or rejected</label>
</div>