 Other romanization schemes are often rejected because either they are unable to represent sounds in Urdu properly, or they often do not take regard of Urdu orthography, and favor pronunciation over orthography.The National Language Authority of Pakistan has developed a number of systems with specific notations to signify non-English sounds, but these can only be properly read by someone already familiar with the loan letters.Roman Urdu also holds significance among the Christians of Pakistan and North India.