I have two questions regarding the Qur'an:
1) I have seen the Qur'an published in India and in Gulf countries, why is 'Na' in the Arab one written as 'Kha' in the Indian one?
2) Why aren't Rukuu' marked in the Arab one?
All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
It is a fact that the script of Qur'an is written in conformity with the style in which the Qur'an is written during the period of the Caliph 'Uthmaan with the consensus of all the companions of the Prophet .
The differences that you have noticed might be due to the style of calligraphy in which the Qur'an is written. There are many styles of calligraphy in Arabic language and every style has its own rules. However, all the styles are within the limits of the script during the caliphate of 'Uthmaan since an authentic committee of specialized scholars in every country supervises the printing of the Qur'an.
As for the existence of the sign of Rukuu' in the Qur'an which is printed in the Indo-Pak region, it is not related to the script during the caliphate of 'Uthmaan. It seems that they used it only to divide each chapter of Qur'an into twenty equal parts to recite it in twenty Raka's of Taraaweeh prayer in the month of Ramadan.
Allaah knows best.
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