 This incident is seen as a watershed marking the transformation of Hebrew into the official language of the Yishuv.Researchers studying the Google Books database noted a fivefold increase in the rate of appearance of new words in printed Hebrew between books published in 1915 and 1920, which they credit to the Balfour Declaration of 1917 and the Second Aliyah.Also in 1913, the Language Committee voted to establish as the official pronunciation a pronunciation of Hebrew loosely based on the Hebrew pronunciation of Sephardic communities because it sounded more "authentic" to their ears than the Ashkenazic pronunciation of European Jewish communities.