Q. Does the Bible forbid foul language?
A. Yes, it does. Consider these warnings:
“Do not accustom your mouth to lewd vulgarity, for it involves sinful speech” (Sirach 23:13).
“When an ungodly man curses his adversary, he curses his own soul” (Sirach 21:27).
“Immorality or any impurity … must not even be mentioned among you … no obscenity or silly or suggestive talk (Ephesians 5:3–4).