Custom "howdy user" wp-admin Bar

gistfile1.php

<?php
// Saudação customizada pt_BR
function replace_howdy( $wp_admin_bar ) {
    $my_account=$wp_admin_bar->get_node('my-account');
    $newtitle = str_replace( 'Olá', 'Bem vindo', $my_account->title );            
    $wp_admin_bar->add_node( array(
        'id' => 'my-account',
        'title' => $newtitle,
    ) );
}
add_filter( 'admin_bar_menu', 'replace_howdy',25 );