Take care not to:

use flattering speech
speak of things of which you have no knowledge
monopolize the conversation
talk about others behind their backs

My Precepts, from Dewdrops on a Lotus Leaf, Zen Master Ryokan

Take care not to:

ignore the people to whom you are speaking
speak sanctimoniously of Gods and Buddhas
use sugary speech

My Precepts, from Dewdrops on a Lotus Leaf, Zen Master Ryokan

Take care not to:

yell at children
make up fantastic stories
speak while angry
name-drop

My Precepts, from Dewdrops on a Lotus Leaf, Zen Master Ryokan

Take care not to:

speak ill of others
speak grandly of enlightenment
carry on while drunk
speak in an obnoxious manner

My Precepts, from Dewdrops on a Lotus Leaf, Zen Master Ryokan

Take care not to:

use fancy words
speak of past events that cannot be changed
speak like a pedant
avoid direct questions

My Precepts, from Dewdrops on a Lotus Leaf, Zen Master Ryokan