Change button text in wordpress storefront theme

I am making Wordpress webiste, and I am using "Storefront" wp-theme, but now I have problem because I am not making website in English, so now I want to change buttons text, on example "View Basket", "Checkout" and "Add to Basket".
But I don't know where can I change it in code. Or what I need to do to change it?

via Chebli Mohamed