If it's used in contradiction to its meaning by people who don't know what it means, that doesn't change its meaning or give it a usable new one. Every Christian fundamentalist in the world is sure what the theory of evolution means and they try to culturally redefine it constantly. Anyone with a basic understanding of biology, the barrier to it being a child's textbook about biology, has a full awareness of its meaning and can actually use it coherently in a sentence. Plenty of liberals will call themselves left-wingers but it's because they're stupid and don't read a single book about what that word means or the mechanics of ideology and society. Accepting the legitimacy of their fuck-fuck game means accepting a false narrative and conflict that they control without understanding. An American who reads a book about American history has clear examples of what liberalism means and how it contrasts with the left through the same dynamics it does in every other country.