Hi @vachaaa
First I would like to clear you that the Buy Now button in the carousel is coming from WooCommerce default. Our Product Slider plugin directly has no options to change the Buy Now button label. More importantly, the Product Slider Plugin Follows the WooCommerce default functions.
So if you want to change the Buy Now button Text then you have to Change it from WooCommerce. Any kind of Changes in WooCommerce will be shown in the Product Sider.
You can either change it by coding or plugins.
Code Source: https://www.codegearthemes.com/blogs/woocommerce/woocommerce-how-to-change-add-to-cart-button-text
Plugins to change the Add to Cart button Text.
https://ww.wp.xz.cn/plugins/woo-add-to-cart-text-change/#installation
https://ww.wp.xz.cn/plugins/wc-custom-add-to-cart-labels/
Thank you very much!