James has important comments about the “tongue” (3956) and its potential for evil. He mentions it twice. The shorter statement is in the first chapter.
(James 1:26 KJV) If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.James brings up the same point that Solomon is making. The tongue needs to be brought into submission to the heart. Christians cannot just say what they feel. They cannot exercise the organ of the mouth without engaging the organ of the brain without it being cleansed by the organ of the heart.
Of course that makes the assumption that the heart is right, that our religion is not vain.
So? What comes out indicates what is inside. If you are not happy with the words or tone maybe it is time for a spiritual tune up.