King James Version
For then will I turn to the people a pure language, that they may all call upon the name of the LORD, to serve him with one consent.English Standard Version
"For at that time I will change the speech of the peoples to a pure speech, that all of them may call upon the name of the LORD and serve him with one accord.New International Version
"Then will I purify the lips of the peoples, that all of them may call on the name of the LORD and serve him shoulder to shoulder.