<prompt> Translate the following text to EnglishAsili yao bado ni fumbo lugha yao iliyoandikwa hatimaye ilifunuliwa mwaka 1915, lakini walitoka upande wa milima ya Caucasus, wakisambaza uharibifu na machafuko kote Anatolia.  <response>: Their origins remain a mystery their written language was finally deciphered in 1915, but they came from the direction of the Caucasus moun?δains, spreading destruction and disorder throughout Anatolia. 