Starting with the Ghaznavids then Seljuks, Turkic influence began to spread into Iran(Persia). Even the languages began to to be intermingles with the Iranian language. Some of the clothing as well had an influence to the Persian population however, the Persian still wore their cultural clothing as well as having the Arabic influence due to the the Ummayyad and Abbasid inlfuences. Anushtegin Gharchai was the founder of the Khwarezmian Dynasty. He was a Turkic slave commander of the Seljuks and governor of Khwarezm. According to the campaign map the vassals are the Ghurids (of Eastern Iranian descent), the Bavanids (Iranians of Mazandaran Northwestern Iran), the Salghurids (Turkmen in orgin southwestern Iran) and lastly the Hazarapids (A Kurdish dysnasty also in southwestern Iran).
Feel free to comment and give ideas on aspects of the Khwarezmians such as armor, weapons and how they should appear in the game as well as their vassals. Here are some pictures from Persian miniatures that shows Turkic influence in clothing in Persia. Would hope the information here would be helpful the workers of this mod to use for the beta and final game for the Khwarezmians so if any of the modders happen to see this feel free to comment as well.
Persian Minatures
The Khwarezmians blended their culture with the Persians as most of the foreign dynasties did such as the Mongol Illkhanate, and Timurids. In several of these beautiful paintings (Persian artists such as the famed Ferdowsi and Baysunghur) you see these hats that have a point at the top which are known as Janjins, which Many Central Asian Turkic peoples wear as did the Mongols. As well as robes called deels, You'll also see tall hats called Kalpaks as well. Wearing boots as well was very popular as you can see in the paintings. The Turkic tribes normally wore boots due to the harsh weather for warmth, protection and horseback riding.
Kalpak hat
Janjin hats and elaborate Deel robes.
Another example of a Deel robe.
Persian Manuscript of Kwharezmian cavalry being watched by Genghis Khan at bottom.