Complex sentence: His translation is considered classic literature itself for its use of contemporary Urdu, and was performed on the request of Mr. John Gilchrist, a famous English scholar of literature of those days.
Split into simpler sentences: His translation is considered classic literature itself for the daily use Urdu of those days that he had used. This translation was performed on the request of Mr. John Gilchrist, a famous English scholar of literature of those days.