Arabic by nature doesn't have many abbreviations like other languages because of it's lack of vowels, so abbreviations end up being a set a consonants that are hard to pronounce and don't sound "correct", so we don't use them often. The name "Daesh" is an exception, it's an abbreviation (although one letter gets changed a little bit) and it does sound "correct" but although it does contain the words Islamic and state, it doesn't have for an Arabic speaker like me the same effect as ISIS have for an English speaker