Hi Jorge,
You could use this PHP snippet to change “by” to “por”.
add_filter( 'generate_inside_post_meta_item_output', function( $output, $item ) {
if ( 'author' === $item ) {
return ' por ';
}
return $output;
}, 50, 2);
Adding PHP: https://docs.generatepress.com/article/adding-php/
And use this CSS to style the author name.
.single-post span.author.vcard a {
color: red; /*change to the color code you want*/
border-bottom: 1px solid red;
}
Adding CSS: https://docs.generatepress.com/article/adding-css/
Let me know π