The Illyrian /ᵻˈlɪriən/ languages are a group of Indo-European languages that were spoken in the western part of the Balkans in former times by groups identified as Illyrians: Ardiaei, Delmatae, Pannonii, Autariates, Taulanti (see List of ancient tribes in Illyria). Some sound changes from Proto-Indo-European to Illyrian and other language features are deduced from what remains of the Illyrian languages, but because there are no examples of ancient Illyrian literature surviving (aside from the Messapian writings if they can be considered Illyrian), it is difficult to clarify its place within the Indo-European language family. Because of the uncertainty, most sources provisionally place the Illyrian language family on its own branch of Indo-European, though its relation to other languages,