What does Acts 2:6 mean?
Days after Jesus' ascension into heaven (Acts 1:9), the Jesus-followers in Jerusalem receive the Holy Spirit and start talking in foreign languages (Acts 2:1–4). In the Roman Empire, multilingualism was common. Typically, Jews from Judea and Galilee could speak Aramaic, Greek, and some Hebrew. Considering the quotations of the Old Testament in the New, it seems Jews studied the Greek Septuagint more than the original Hebrew Scriptures. At the time of Acts 2, the population of Jerusalem has swelled ten times over because of the celebration of Pentecost with visitors from all over the Roman Empire and beyond (Acts 2:9–11). The crowd is baffled as to how Galileans (Acts 2:7) can speak their native languages.After the flood, all the world still spoke the same language. God told the people to scatter all over the earth, but they settled together and built a great tower as if they could reach heaven through their own work. God reached down and confused their language, separating people-groups by their ability to understand one another (Genesis 11:1–9).
Now, in Jerusalem, God sets the linguistic precedence for missions by continuing to honor His own work at the Tower of Babel. The Holy Spirit doesn't cause the multitude to be fluent in Greek or Aramaic; He doesn't even tell believers in the early church to share one earthly language or earthly culture (Acts 6:1). He makes the evangelists or missionaries able to speak the people's native language. He leads Christians to meet unbelievers where they are, culturally and linguistically. One day, culture and language will be redeemed and all God-followers will be able to understand each other perfectly. But today, we are no more freed from the results of Babel than we are freed from weeds and pain in childbirth (Genesis 3:16–19).
There is no record that Jesus regularly spoke a different language other than Aramaic. But He came, in His earthly ministry, to the Jews, to give them a chance to accept Him, not the Gentiles (Mark 7:24–30). Jesus promised the disciples they would do greater works than He (John 14:12), and this is an example. Jesus did not mean that there is any greater work than His' crucifixion and resurrection, but that the scope of their ministries as they travel the world and speak to people from all nations will be greater than Jesus' ministry in Judea, Samaria, and Galilee.