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.
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.
Yes very true, most of us probably knew that already