What is the main language of the Islamic religion?

Answer 1

Classical Arabic is the liturgical language of Islam as the scriptures are written and prayers recited in the language. Today, Muslim people speak the language of the country they're from and/or live in. There are Muslims from almost every nation on the planet, therefore it's not unreasonable to assume Muslims speak most languages on Earth.

Answer 2

Arabic

The revelation of Quran, the holy book of Islam religion, to Prophet Mohamed by God through the Angel Jibril (or Gabriel) was in Arabic. This Quran revelation continued from year 610 until Prophet death in 632. So the original language of Quran is the Arabic. However, the Quran interpretation of its meaning is presently available in all world languages. The exact and accurate single translation of Quran into any language is impossible.

However, Islam is presently having believers spread all over the world. Accordingly, every Muslim is worshiping in his own language except few Quran verses and few praying words that he should know in Arabic.

Answer 3

The sacred language of Islam would be considered Arabic, as that is the language that the Qur'an is written in and the language that Prophet Muhammad spoke and said his hadith in.

Answer 4

Arabic, because the Quran was revealed to Prophet Muhamed(peace be upon him) in Arabic