Hello, @LambdaSP,
1. Estimated Delivery: It was coming from XStore >> Dashboard >> Sale Booster >> Estimated Delivery (beta) and you can change the title from there as per your requirements: https://postimg.cc/hQLcBGKb
2. Quantity: That has been set on ::before, So I have changed it using the Custom CSS: https://postimg.cc/GT8z8B4G https://postimg.cc/14kr73g7
3. Compare: You can change it from Yith >> Compare >> Settings as per your requirements: https://postimg.cc/VryNQpjw https://postimg.cc/8sShLnxx
4. Price, Stock, and Add to Cart are already translated: https://postimg.cc/gLzXQ1WJ
5. Product added to cart successfully: That was coming from the Yith WooCommerce Wishlist plugin, so I have translated it from the plugin language files: https://postimg.cc/949LQwq9 https://postimg.cc/5jgnyVjs
6. Welcome to your account page: Solved, I have translated it into the Theme language files: https://postimg.cc/mtRWfRJV https://postimg.cc/YGcy6zw8
7. You may also like… Solved, I have translated it into the Theme language files: https://postimg.cc/Sj39dSTT https://postimg.cc/mcghRJp1
8. Congratulations! You’ve got free shipping: Solved, I have changed it from XStore >> Sale Booster >> Progress Bar: https://postimg.cc/G9LRfGN9 https://postimg.cc/nXDfmksS
Regards 8Themes Team.