Genesis - Chapter 11

In the chapter we have the construction of a city with a tower - a tower to reach the heavens, built out of pride.  And in response God scattered the people throughout the world, and caused them to speak in numerous languages - so that they did not understand each other.

This story of languages is followed up in the book of Acts.  In Chapter 1, just before Jesus ascends into heaven, he says to his disciples "you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem.

And that is exactly what happens on the day of Pentecost - recorded in Chapter 2.  The Holy Spirit does come on them and they do receive power and they do witness about Jesus.  

Now there were staying in Jerusalem God-fearing Jews from every nation under heaven. When they heard this sound, a crowd came together in bewilderment, because each one heard their own language being spoken. Utterly amazed, they asked: ‘Aren’t all these who are speaking Galileans? Then how is it that each of us hears them in our native language? Parthians, Medes and Elamites; residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia, Phrygia and Pamphylia, Egypt and the parts of Libya near Cyrene; visitors from Rome (both Jews and converts to Judaism); Cretans and Arabs – we hear them declaring the wonders of God in our own tongues!’

God created the multiple languages and spread mankind throughout the world in different nations.  But every nation will hear of Jesus in their own language.