Not really. The language in lower class is coarse, but it's also very blunt. For example, I was once told that it must be irritating to know myself by some work

Not really. The language in lower class is coarse, but it's also very blunt. For example, I was once told that it must be irritating to know myself by some working class, or I've been insulted by a food order. This is how they talk among each other. Heavy insults and expressing your opinion is unambiguous. In upper class, the language probably has more "fucks per minute," but there is a fluid dance that moves between honesty and somewhere else. Any compliment like "a great conversation" or "I like your clothes" is on a continuum rather than a discrete statement. That's a simple example, but everything sort of falls along these lines, and it's exhausting to parse it all.