WooCommerce Custom Add To Cart is a free WordPress plugin to change the WooCommerce cart button text and add an icon. You can use it to change or remove the add to cart text, or add a WooCommerce cart icon to the button.
A few example uses:
You can add a cart icon to the buttons, or replace the text completely and just show a cart icon.
The plugin is fully accessible – if you choose to display just the cart icon, the text is still present in the HTML and can be read by screen readers.
All the plugin settings can be accessed from the WordPress Customizer under the WooCommerce > Add to Cart Buttons panel.
Please see the WordPress.org plugin page for more information.