I want to know the answer to the following question:
What is "Illyrian?"
All the background I'm provided with is that "During that period, the language was referred to under a variety of names, such as "Slavic", "Illyrian", or according to region, "Bosnian", "Serbian" and "Croatian", the latter often in combination with "Slavonian" or "Dalmatian".". Is that enough to answer the question?
Answer: yes