Custom login page error notices

@nojuju

You can try using the “Say What?” plugin and use ultimate-member as the Text domain:

https://wordpress.org/plugins/say-what/

@nojuju

You can try to remove this UM filter and replace with your custom code
for the filter with your own awaiting_email_confirmation message.

/**
 * Login checks thru the wordpress admin login
 *
 * @param $user
 * @param $username
 * @param $password
 *
 * @return WP_Error|WP_User
 */
function um_wp_form_errors_hook_logincheck( $user, $username, $password ) {

	if ( isset( $user->ID ) ) {

		um_fetch_user( $user->ID );
		$status = um_user( 'account_status' );

		switch( $status ) {
			case 'inactive':
				return new WP_Error( $status, __( 'Your account has been disabled.', 'ultimate-member' ) );
				break;
			case 'awaiting_admin_review':
				return new WP_Error( $status, __( 'Your account has not been approved yet.', 'ultimate-member' ) );
				break;
			case 'awaiting_email_confirmation':
				return new WP_Error( $status, __( 'Your account is awaiting e-mail verification.', 'ultimate-member' ) );
				break;
			case 'rejected':
				return new WP_Error( $status, __( 'Your membership request has been rejected.', 'ultimate-member' ) );
				break;
		}

	}

	return $user;

}
add_filter( 'authenticate', 'um_wp_form_errors_hook_logincheck', 50, 3 );