themepaint

// Register Custom Taxonomy
function ess_custom_taxonomy_Item()  {

$labels = array(
    'name'                       => 'Brands',
    'singular_name'              => 'Brand',
    'menu_name'                  => 'Brands',
    'all_items'                  => 'All Brands',
    'parent_item'                => 'Parent Brand',
    'parent_item_colon'          => 'Parent Brand:',

themepaint

add_filter( 'woocommerce_product_single_add_to_cart_text', 'custom_single_add_to_cart_text' );
  
function custom_single_add_to_cart_text() {
global $product;
if( $product->is_type( 'variable' ) ){
  
    return __( 'HD Download', 'woocommerce' );
  
}else{

themepaint

//archive page or main page

add_filter( 'woocommerce_product_add_to_cart_text', 'woo_custom_product_add_to_cart_text_themepaint' );  // 2.1 +
  
function woo_custom_product_add_to_cart_text_themepaint() {
  
    return __( 'Buy it on ebay', 'woocommerce' );
  
}