[OneWingedShark]

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.

It just says that the language will be pure, it doesn't say a particular language.
Moreover, what of all the descriptions of Heaven being filled with people of every nation, tribe, and tongue?
(See Revelation 13:7, Revelation 5:9-10, Revelation 7:9)

[editor-surveyor]

With one consent.

The Masoretic is clearer on this, English translators left most of the meaning behind.