Language is okay without cuss words, but language is enhanced by cus words, which I will call vocabulary enhancers, which are cuss wortwos. I got that term from an episode of Spongebob. Spongebob was reading graffiti and when he came across a word he never heard, a dolphin noise came out. He walked around all day saying "How the _____ (dolphin noise) are ya?" Mr. Krabs confronted him, saying that he should never say those 7 words (14 if you're a sailor) again.
They are only vocabulary enhancers if you use them in moderation. I'm mainly talking about the word fuck, but all add a bit of enhancement.
Noun: "What a dumb fuck"
Verb: " Fuck me runing"
Adjective: "Fucking great"
Greetings: "How the fuck are you?"
Aggression: "Fuck you!!!"
Confusion, Curiosity or Disbelief: "What the fuck?"
Good Job: "Congratufuckinglations"
Intelligence: "He's a fucking genius."
Lost: "Where the fuck are we?"
Pain: "fuck! that hurt"
Admiration: "Nice fucking tits"
Stupid person: "dumbfuck"
Suspicion: "Who the fuck are you?"
Panic: "Let's get the fuck out of here!"
Directions: "fuck off"
Praising the Lord: "Jesus fucking christ"
Be quiet: Shut the fuck up"
Confidence: "fuckin' A"
Enraged: "I'm gonna fuck you up"
If overused, it's no longer a vocabulary enhancer. Once I counted how many times two people used the word fuck. Nineteen times in four minutes. Now that's too much. It kinda loses it's oomph if overused like that.
Hardly any words, if any at all are quite as diverse as this one.