Tilda has a large set of system texts that cannot be changed through the editor — they are hardcoded in JavaScript. This includes the entire shopping cart interface ("Added to cart", "Total", "Checkout"), delivery forms (address fields, service names), store filters ("All", "Nothing found", "Sort by price"), form validation messages, and the personal account and authentication interface.
The service inserts translated dictionaries directly onto the page — the browser receives them already in the desired language.