Personalized search url

Hi!

I was looking how to change the default
/?s=

I found out this code, but I didn’t work, I also found a .htaccess code, but I didn’t made any change either

function change_search_url_rewrite() {
    if ( is_search() && ! empty( $_GET['s'] ) ) {
        wp_redirect( home_url( "/buscar/" ) . urlencode( get_query_var( 's' ) ) );
        exit();
    }   
}
add_action( 'template_redirect', 'change_search_url_rewrite' );

Any suggestions?

Thank you!