Original sentence: Other ethnic groups that were also traditionally referred to as Vlachs in Croatia now identify by their respective ethnic names – namely Serbs, Romanians, Aromanians and Istro-Romanians (which are native to modern Croatia's Istria County)
Edited sentence: Other Eastern Romance-speaking ethnic groups that were also traditionally referred to as Vlachs in Croatia now identify by their respective ethnic names – namely Serbs, Romanians, Aromanians and Istro-Romanians (which are native to modern Croatia's Istria County)