In English, we can casually acknowledge another person's *thank you* by saying "Don't worry about it", "No problem", "Don't mention it", or "It's nothing", but the formal acknowledgement is: "You're welcome." Welcome isn't used as an empty adjective like this in any other way, other than this phrase. You can be welcome to join a party, or welcome in someone's home, but when someone says thank you, and the response is "You're welcome", there's no answer to what they're welcome to do. They're just... welcome.
In dutch this is ‘Graag gedaan’