"And into whatsoever house ye enter, first say, 'Peace be to this house.' And if the son of peace be there, your peace shall rest upon it: if not, it shall turn to you again." - Jesus (Luke 10:5,6 KJV)

It seems to me that "to speak one's peace" is one of our many common phrases borrowed from the Bible, like "my two-cents worth" or "a little bird told me." In the above scenario after the disciple speaks "Peace," his obligation is fulfilled; the response rests on the listeners.

Isn't this essentially what "to speak one's peace" means today?