"Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers." (Eph. 4:29)
This seems to me to be much more about the things we say and less about the vocabulary we use to say them
I would have to disagree.
As with everything else, Jesus Christ must always be our example.
It is written of Christ that "out of his mouth went a sharp two-edged sword" (Rev. 1:16), and, of course, we all recognize that the "sharp two-edged sword" refers to the word of God:
"For the word of God is quick, and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart." (Heb. 4:12)
In other words, as Christ said oftentimes in ways very similar to the following:
"For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak." (John 12:49)
If we are to properly represent Christ upon this earth, then we need to be careful to only speak that which the Father would have us to speak as Christ did himself.
Jesus only spoke the incorruptible seed of the word of God (I Pet. 1:23), and this is why I deliberately chose to cite the verse which instructs us to "let no corrupt communication proceed out of our mouths".
Would Jesus be swearing like a sailor?
Of course, he would not be, and neither should we be.
Again, we should only be speaking "that which is good to the use of edifying" or building up, but that can be a little tricky because we oftentimes need to root out, pull down, destroy, or throw down in order to properly build up or plant (Jer. 1:10).
Our underlying motive in everything that we say or do must be to "minister grace unto our hearers", but, again, we oftentimes need to rebuke in order that others might truly repent and be recipients of God's grace.
When it comes to the vocabulary that we employ in this process, we must strive to be careful to stay within the parameters of scripture.
God/Jesus said some pretty strong things throughout scripture in order to hopefully awaken people to their true conditions, and I've similarly employed some pretty strong language in my own dealings with people over the years.
HOWEVER, unlike God/Jesus, I have admittedly crossed the line at times, and I've needed to repent myself after doing so.