Hello,
1) Go to Theme Options > WooCommerce > Shop Elemenents > Product stock > change the color of the low stock.
2) Provide us with link to the product where you have “Your selections”. If you want to disable the stick add to cart you can do this in Theme Options > WooCommerce > Single Product > Single product layout > Fixed Added To Cart Message > off.
3) Read the documentation https://xstore.helpscoutdocs.com/article/30-base-theme-translation
Translate XStore theme, not child theme and XStore core plugin. I have uploaded translation that we got from another customer. Check the strings if everything is ok for you.
Regards