Lashon Hakodesh, also spelled L'shon Hakodesh or Leshon Hakodesh, is a Jewish term and appellation attributed to the Hebrew language, or sometimes to a mix of Hebrew and Aramaic, in which its religious texts and prayers were written, and served, during the Medieval Hebrew era, for religious purposes, liturgy and Halakha – in contrary to the secular tongue, which served for the routine daily needs, such as the Yiddish language. Wikipedia