Claim down first.        
If you want to believe in Wikipedia then read the link I sent that said Yezidis in Bashiqa speak Arabic as their mother language.      
And, again, Yezidis are not Kurds, they speak Kurdish in some areas of Iraq yes but they are not Kurds ethnically.         
I suggest you read The Last Yezidi Genocide by Amy Beam. You will learn alot from it.  
https://www.amazon.com/Last-Yezidi-Genocide-Amy-Beam/dp/0979083516