If the Chaldeans expected Nebuchadnezzar to now lay before them his dream, they are in for a shock. He wanted someone better, someone with such a grasp that they could figure out his dream without him even telling them what it was about.
Nebuchadnezzar would not have been impressed with modern tongues movement. No corroboration; not a real language, neither the tongue speaker nor the interpreter understanding what they are saying.
How wonderfully God engineered this situation! He gave Nebuchadnezzar this dream, and he gave him a sense of the awesome nature of the communication, but he forced him to obtain the interpretation from elsewhere. This was going to be used to show how impoverished the phony wise men of Babylon were, and it was going to be used to show that true knowledge of the future resides with God alone, and he reveals it only through his prophets. It is God’s people alone who understand the divine purposes that are working themselves out in history. There are many things that remain mysterious for us also, but God shows us the big picture and we have a framework for understanding events, while the world remains baffled in many respects.