Speaking in tongues (other languages)

Mark 16:15-17 .....'And he said unto them, Go ye into all the world, and preach the gospel to every creature. He that believeth and is baptized shall be saved; but he that believeth not shall be damned. And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues.'

This is the great commission from Jesus for His followers to go into Speaking Tongues the world and preach the good news of the gospel message. Now we know that the world is full of different nations, with people speaking different languages, so what gift would the disciples need in order to preach the gospel to these different nations? They would need the gift of tongues, to be able to speak the various languages of the world. Now were the disciples trained in speaking different languages? No, they would need to be filled with the Holy Spirit to start speaking in tongues (languages) to preach the gospel. And Jesus told them to wait in Jerusalem for the power of the Holy Spirit, which would empower them to start speaking in tongues (different languages):