“We have sent it down as an Arabic Qur’an so you people may understand / reason”
Allah (SWT) revealed the Holy Quran to Prophet Muhammad (SAW) in Arabic since the last prophet was from the people of Arabia. The Quran is the last of the revealed scriptures that has been sent as a guiding light towards the human race which has been surrounded in darkness. Since it was revealed to Prophet Muhammad (SAW) in Arabic, it is compulsory for all Muslims to recite the Quran in the original sacred language that Allah himself chose over all the others. Arabic is a very popular language as it is the national language of over 26 countries in the Middle East as well as being an official language at the United Nations. Above all that is the fact that Allah (SWT) Himself chose this language to preserve the greatest and holiest of the scriptures for all eternity.
It is advised to anyone who is getting into Quran or Islamic education that they try to learn classical Arabic. Arabic is a very unique language and has many linguistic and grammatical complexities that are not found in any other language of the world. In order to gain in depth understanding of the word of Allah (SWT), it is best to recite the Quran in the language it was revealed. In most Muslim countries, Arabic is part of the school curriculum from an early age. Other than in schools, there are many institutes and Islamic centers where a person can learn classical Arabic. For those who are lack such facilities in their areas due to their location meaning they live in non-Muslim countries where such facilities are limited, they can now easily learn the language of the Quran by enrolling in any Arabic classes online.