Hello, Regarding to this one: https://www.8theme.com/topic/built-in-woocommerce-email-builder-two-languages/
Let’s say that I use template in English and set the apply billing countries to all and If I want to create for another language, I duplicate the English template and change the content and set the billing country to specific one. In that case I was chosen all countries in English template, Customer will receive the English one or the one which I duplicated with the specific content.