For example, in Persian Farsi and Arabic these the the long 'i' sound which occurs when a Yeh comes after a Kasreh and doesn't have a vowel itself, i.e. ـِي and sounds like the 'i' in 'machine'. In Afghan Farsi though, as well as older Farsi, there is a long 'e' sound, which sounds like the 'ee' in the word 'eel'. So for example, instead of 'Iran' in Persian Farsi, some Afghans pronounce it as 'Eran'.