The letter ب (Bay) is common in Urdu and Arabic. It is alike English letter 'B'. Usage in Urdu: Behn (sister), Bayta (son), Bayti (daughter) Usage in Arabic: Baab (door), Bayt (house), Baqara (cow) Usage in English: Black, Back, Best The letter پ (Pay) does not exist in Arabic. In English its counterpart is letter 'P'. Usage in Urdu: Pakistan, Punkha (fan), Pani (water), Pooda (plant) Usage in English: Password, Petrol, Past, Pink, Payment Native Arabic speakers find it difficult to pronounce پ (Pay) = 'P'. So, they usually use ب (Bay) = 'B' instead of 'P'. Example: Bakistan instead of Pakistan

پ gives the sound of P and ب gives the sound of B

پ is pay(pa). e.g. Papaپاپا (father) . ب is bay(ba) e.g بابا Baba. In arabic there is no P, but in Urdu, this is the alphabet for p. My arab neighbour pronounces 'baber'( and not paper :D)