What kind of language did India first use in literature ?
Research Sir John Malcolm did 200 years ago is based on a work from Italy in 1650 " Lingua Corteggiana " when he wrote ( Dari was written in Europe " Deri " ) : " The name Deri is derived from Der , a word which runs through so many languages , and is to be traced in the Greek Θύρα , the German Thur , and our door .