You clearly don’t understand either

I went through OP’s history and confirmed… unfortunately yes, OP really is that dumb.

My understanding (I don’t know much about Arabic) is that Daesh is kind of a westernization of Da’ish, which is itself the latinized version of the Arabic acronym.

Apparently Daesh is what their arabic-speakkng opposition calls them becauss of puns with other negative Arabic words.

Even the Islamic State has never called themselves ISIS.

First of all, they would use Arabic. Secondly, their full name translates more appropriately to the Islamic State of Iraq and the Levant. The Levant is a geographical and historical region that roughly overlaps with what we call Syria today, but is not quite the same. So the better translated acronym would be ISIL. ISIS is a sloppy attempt at westernization.