James is very clear (as is Jesus) about the kind of language that should come out of my mouth. I know that what I say is a reflection of my heart.
My mission is to love. My language should reflect that. That is the way it should be.
It should be that way at work. It should be that way at home. It should be that way every waking minute of every day.
With the tongue we praise our Lord and Father, and with it we curse men, who have been made in God’s likeness. Out of the same mouth come praise and cursing. My brothers, this should not be. ~~James
Source: James 3:10