Languages
Speaking a language badly on purpose
Waiting until you are ready to speak is the most common way to never speak, and there is a case for the opposite.
Topic
confidence
Every I Am Talkative article tagged confidence — 2 pieces across 2 sections.
Voice & Accent
Sounding confident when you are not
Perceived confidence is produced by a handful of specific behaviours, and they can be adopted without deceiving anyone.