But even a better example that God has (is able to speak) a mysterious language (no matter if He uses it or not) is this:
In the same hour came forth fingers of a man's hand, and wrote over against the candlestick upon the plaister of the wall of the king's palace: and the king saw the part of the hand that wrote. Then the king's countenance was changed, and his thoughts troubled him, so that the joints of his loins were loosed, and his knees smote one against another. The king cried aloud to bring in the astrologers, the Chaldeans, and the soothsayers. And the king spake, and said to the wise men of Babylon, Whosoever shall read this writing, and shew me the interpretation thereof, shall be clothed with scarlet, and have a chain of gold about his neck, and shall be the third ruler in the kingdom Then came in all the king's wise men: but they could not read the writing, nor make known to the king the interpretation thereof. Then was king Belshazzar greatly troubled, and his countenance was changed in him, and his lords were astonied. Now the queen, by reason of the words of the king and his lords, came into the banquet house: and the queen spake and said, O king, live for ever: let not thy thoughts trouble thee, nor let thy countenance be changed: There is a man in thy kingdom, in whom is the spirit of the holy gods; and in the days of thy father light and understanding and wisdom, like the wisdom of the gods, was found in him; whom the king Nebuchadnezzar thy father, the king, I say, thy father, made master of the magicians, astrologers, Chaldeans, and soothsayers. Forasmuch as an excellent spirit, and knowledge, and understanding, interpreting of dreams, and shewing of hard sentences, and dissolving of doubts, were found in the same Daniel, whom the king named Belteshazzar: now let Daniel be called, and he will shew the interpretation.
Then was Daniel brought in before the king.........
Then was the part of the hand sent from him; and this writing was written. And this is the writing that was written, MENE, MENE, TEKEL, UPHARSIN. This is the interpretation of the thing: MENE; God hath numbered thy kingdom, and finished it. TEKEL; Thou art weighed in the balances, and art found wanting. PERES; Thy kingdom is divided, and given to the Medes and Persians.
So tell me was this Gods language/writing? Are you sure you know all details of God's language and what He can or cannot do and does? Does God need to prove to you that He still can do what He can do? Than ask God for gifts/ tongues privately in your bedroom, while you pray honestly and without presumptions.