It has been said that Muhammad Shah (1835-1848) king of Persia ordered to put up money for the promotion of the “Pahlavi” language. Unfortunately there was no learned teaching priest (Zoroastrian) in Yazd who knew well the language, and the project fell into oblivion.
From the letter of Manockji Limji Hoshang Hataria to the Zoroastrians (Dec. 1882).