The leftist position is the imposition of the language is yet another form of oppression. Crafting new social hierarchies based on language, like has has existed throughout time, is wildly incompatible with leftism.
Anarchism, Libertarianism, these are closer to leftism than liberalism.
The liberal would reproduce class hierarchies through language and phrasing virtue signaling, ignoring and respecting people based on their use of language. The left has no such masters which is why they have such a hard time consolidating and organizing - there isn't a central cultural idealism.
And just to be clear, I'm perfectly happy with being ahead of the curve on this one and getting the "down votes". I know most people don't currently see or care about this distinction, but it's really important.
The two words begin with "L" and sound alike and the liberal party tries to capture the left like the conservatives try to capture libertarians, but these four things aren't really two things and their differences matter.