The answer depends on several factors. What countries are included in S.W. Asia? What minimum percentage of speakers counts as a "main language"? (80%? 67%? 50%?) Must dialects be mutually intelligible to be called one language? Can there only be one main language?
Assuming you answer the above questions in a certain way, you could say that Arabic is the main language of S.W. Asia. Otherwise, there is no answer, given the diversity of languages in this region (and most regions this size).
It's hard to select one language as the main language of an area so large, given that there are about 6,909 living languages in the world today, to our best knowledge. In Asia, there are about 2,322 living languages. In selecting Arabic, remember that there are multiple "dialects" of Arabic that vary in degree of (mutual) intelligibility, or lack thereof.
Southwest Asia, also called the Middle East, has ARABICas the predominant language spoken. However, the dialects differ from country to country.
Arabic.
a.oil b.date plaims c.cotton d.petrochemicals THE ANSWER IS OIL BECAUSE THAT'S THE MOST IMPORTANT PRODUCT IN SOUTHWEST ASIA
Arabic dialects, followed by Farsi and Hebrew.
The two main peninsulas in Southwest Asia are the Arabian Peninsula (which includes Saudi Arabia, Iraq, Kuwait, Bahrain, Qatar, Jordan, United Arab Emirates, Yemen, Oman), and the Anatolia or Asia Minor (conisiting of mostly Turkey).
Arabic
Southwest Asia, also called the Middle East, has ARABICas the predominant language spoken. However, the dialects differ from country to country.
The Arabic language is the dominate language of North Africa and Southwest Asia.
Arabic.
Arabic is the major language in Southwest Asia. :)
The United States is primarily concerned with petroleum
The largest ethic group in southwest asia is the Arabs.
Pashto (Afghanistan)
Chinese
Poverty.
a.oil b.date plaims c.cotton d.petrochemicals THE ANSWER IS OIL BECAUSE THAT'S THE MOST IMPORTANT PRODUCT IN SOUTHWEST ASIA
I ask anyone to correct this but I say Iran.