Change text on Button

Hi! Is it in this text below i can change to change the text on the button or should i use some css?

/**
* Modify the Add to Cart button text based on settings.
* @since 1.0
*/
function qwc_change_button_text() {

global $post;
$post_id = $post->ID;
// check if setting is enabled
$enable_quote = product_quote_enabled( $post_id );

if ( $enable_quote ) {
$cart_text = __( ‘Request Quote’, ‘quote-wc’ );
} else {
$cart_text = __( ‘Add to Cart’, ‘quote-wc’ );
}

Thanks!
/emma