I've been living in Kurdistan for about two months now and have really got into studying Kurdish. As I have explained in other posts, the Kurdish dialect (or language) that they speak in Iraq and southern Iran is called Sorani. The standard dialect of Sorani is based in the east of Kurdistan, around the towns of Soran, Sulaymaniyah (Slêmanî in Kurdish) and down to Kirkuk. In some ways this is the cultural and linguistic capital of the region. The speakers there sum for a much purer Kurdish without all the Arabic and Turkish loanwords and calques. This is also seen as some sort of standard of Sorani Kurdish and thus is the style that other Sorani speakers will imitate when trying to speak formally or correctly. This can be compared to RP in England.