WordPress fonts need to upload with Google fonts?

You should never touch any files in wp-includes or wp-admin. Why? Because the next time you update WordPress, any changes you made will get erased.

Option 1 – Easy

If you want to use Google fonts with your WordPress theme, try a plugin like Easy Google Fonts or WP Google Fonts.

Option 2 – More Work

If you want to programmatically add Google fonts without using a plugin, you’d paste this code in your themes’ functions.php file.

Note: there is no Helvetica Light font available from Google. Open Sans seems to be a close match though.

function my_custom_google_fonts() {
  wp_enqueue_style( 'my-google-fonts', '//fonts.googleapis.com/css?family=Open+Sans:300,400', false ); 
}
add_action( 'wp_enqueue_scripts', 'my_custom_google_fonts' );

Then you need to reference that new font in your themes’ style.css file.

body {
  font-family: 'Open Sans', sans-serif;
}