sentences:  Some of the more prevalent theories supported by scholarship are presented below.Since Greek is classified as an Indo-European language, the major question of concern is whether Pelasgian was an Indo-European language.The theory that Pelasgian was an Indo-European language, which has "fascinated scholars" and concentrated research during the second part of the 20th century, has since been critiqued; an emerging consensus among modern linguists is that the substrate language spoken in the southern Balkans was non-Indo-European.