You can reform your tongue! Start by pattering your conversation after Jesus.

Jesus spoke gracious words:

And all bare Him witness, and wondered at the gracious words which proceeded out of His mouth, And they said, Is not this Joseph's son? (Luke 4:22)

Jesus spoke words of authority:

And they were astonished at His doctrine: for He taught them as one that had authority and not as the scribes. (Mark 1:22)

There was no guile (sinful speaking) found in His mouth:

Who did no sin, neither was guile found in His mouth; Who, when He was reviled, reviled not again; when He suffered, He threatened not; but committed Himself to him that judgeth righteously. (1 Peter 2:22-23)

You can choose to speak: