New International Version
"Then I will purify the lips of the peoples, that all of them may call on the name of the LORD and serve him shoulder to shoulder.

American Standard Version
For then will I turn to the peoples of a pure language, that they may all call upon the name of Jehovah, to serve him with one consent.

Berean Study Bible
For then I will restore pure lips to the peoples, that all may call upon the name of the LORD and serve Him shoulder to shoulder.

Douay-Rheims Bible
Because then I will restore to the people a chosen lip, that all may call upon the name of the Lord, and may serve him with one shoulder.

English Revised Version
For then will I turn to the peoples a pure language, that they may all call upon the name of the LORD, to serve him with one consent.

King James Bible
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.

World English Bible
For then I will purify the lips of the peoples, that they may all call on the name of Yahweh, to serve him shoulder to shoulder.

Young's Literal Translation
For then do I turn unto peoples a pure lip, To call all of them by the name of Jehovah, To serve Him with one shoulder.

Zephaniah 3:9 Additional Translations ...