How do we protect culture in a libertarian society?

Some of you may not care about the culture of a people or an area, but i do. I love the culture i was born and raised in and i dont want that to change. How do we protect it without authoritarianism? I want to protect the spanish language, the New Mexican cuisine, the catholic traditions, the cowboy lifestyle and aesthetics, the hispanic culture that has been dominant in this land for centuries, thats the culture of my state of New Mexico. Mass migration and transplants are changing the culture of my land and i dont like it, but I dont want to become an authoritarian either