The ONLY people afraid to speak in tibia are those people who are severely lacking in interpersonal communication skills. People who don't know how to speak without swearing of throwing insults at one person (or groups of people).
It is incredibly easy to play tibia, chat it up and NEVER, EVER get nailed with an offensive statement. Think before you speak, and learn how to communicate without swearing, insults of sexual overtones. It's really not hard to do ...