It is written in Arabic.(read from right to left and back to front.)
Arabic is the fifth-most spoken language worldwide, with over 200 million people speaking it as a first language, and more than 20 million people speaking it as a second language. It is related both to Aramaic and Hebrew, and is the largest member of the Semitic language branch. Arabic consists of many various dialects, some of which are mutually incomprehensible. While everyone knows their own regional dialect of Arabic, every Arab nation has as its official language a form of Arabic known as classical or literary Arabic. This is the language of the Qur’an, and is considered by most Arabs to be the true Arabic — while local variations are viewed as simple regional dialects.
The existence of a standardized form of Arabic allows speakers from drastically different regions to communicate intelligibly, even when their local dialects might not be understood by the other. Most Arabic speakers are able to seamlessly switch between their regional dialect and the classical Arabic of the educated classes. It is difficult to separate the Arabic language from the holy text of Islam, the Qur’an, and it is even more difficult to separate the Qur’an from Arabic. Not so long ago, many Muslims considered even the idea of translating the Qur’an from Arabic to another language to be absurd if not blasphemous, while many modern Muslims believe that while a translation may be attempted, no language other than Arabic can accurately convey many of the thoughts of the text.