It's a joke mate. It's often an Ayn Rand supporter thing to
have really fixed understanding of what words mean, and postmodernists tend to reject the fixed meaning of language.
My definitions go far beyond just 18th century France, that's just where they originated.
The also do match the current dichotomy, except for people who think small government and economic freedom = conservative beliefs, which they are not. No other Western country uses that term that way. Everyone else universally uses liberal. Because if you know any of the history behind the belief in small government and economic freedom, then you know it has origins in the left.
You see, it was left wing when people had economic privileges: the nobility could avoid taxes and tariffs choked trade and proliferation of goods. After economic liberalization, some people still found ways to seek rents. Those people are strongly conservative towards the system benefiting them currently. So those people have strong right-wing impulses and dominated the right-wing in America until it decided fascism was better to win votes.
So you see, free trade or not isn't left or right intrinsically, which is maybe the confusion: particular beliefs aren't left or right, political impulses are. I'm not kidding when I say you can divide people today easily based on how they think about billionaires. Ask someone if we should take wealth from billionaires. Right-leaning people almost always say no, and give some form of "they earned it" justification. They see this wealth hierarchy as good and inevitable. I can't think of a single belief which doesn't come down to this core reflex.
In any case American words are bad, stupid, and harmful to discourse as they are now, so really any change at all would be good.