This question is an exact duplicate of:
Our tradition mentions the serious transgression of "nivul peh" and the punishments that Hashem brings down on the world due to this sin (Shabbos 33a, Vayikra Rabba 24-7).
What I want to know is if this applies to the regular American curse words such as the F-word, the S-word and similar words. It would seem from some of the sources that it only applies to discussing private sexual matters in a non-respectful way. Would this mean that the F-word is more problematic than the S-word because the former has a sexual connotation, while the latter doesn't? Or maybe these words are not included at all if not used in a sexual connotation in the wrong way? What about words like the B-word? I understand that we shouldn't be using these words at all. I'm just wondering if it's included in the severe sin of "nivul peh" that Chazal discuss.