Hello,
It seems that you are not targeting the correct path to translate the text for Add to cart and select options. You need to target Plugins >> WooCommerce from Dashboard >> Loco Translate.
Screenshots for Clarification: https://www.screencast.com/t/YeJGFde1
https://prnt.sc/jrnq5v
https://prnt.sc/jlwq55
If you are still unable to translate then provide with admin panel login details and the URL of the website so I will translate them for you.
Best Regards.