Illyro-Roman refers to a language group that was spoken a long time ago in a place called Illyria, which is now known as the Balkans. This group of people spoke a language that was a mixture of the language spoken in Rome and the local language of Illyria.
Imagine you and your friend both speak different languages, but you want to play games together. You might mix some words from each language to make a new language that you both understand. This is like what happened with the Illyro-Roman language.
The Illyro-Roman language was spoken by different groups of people who lived in Illyria, but over time, the language changed and evolved. Later, the people who spoke this language were conquered by the Romans, and their language was heavily influenced by Latin, the language spoken by the Romans.
In fact, many of the words in the Illyro-Roman language were replaced by similar Latin words, and the language eventually became extinct. However, today we can still see some words and phrases from the Illyro-Roman language in the modern languages spoken in the Balkans.