What happened to illyrian national minoroties?

Illyria is basically a croatian-led project (official languages are german and croatian, according to the wiki), but other minorities live in the crowland’s territory, like serbs, bosnians and italians. What happened to them? Serbia and (former) Italy were former enemies, it is possible that they have undergone a process of forced “Croatianization”?

Illyria is basically a croatian-led project (official languages are german and croatian, according to the wiki), but other minorities live in the crowland’s territory, like serbs, bosnians and italians. What happened to them? Serbia and (former) Italy were former enemies, it is possible that they have undergone a process of forced “Croatianization”?