I want to know the answer to the following question:
What is another term for Western Iran?
All the background I'm provided with is that "Arabic spread into some parts of Western Iran (Khuzestan), and Turkic languages spread through much of Central Asia, displacing various Iranian languages such as Sogdian and Bactrian in parts of what is today Turkmenistan, Uzbekistan and Tajikistan.". Is that enough to answer the question?
Answer: yes