 He finds Etruscan on one hand genetically related to the Rhaetic language spoken in the Alps north of Etruria, suggesting autochthonous connections, but on the other hand the Lemnian language found on the "Lemnos stele" is closely related to Etruscan, entailing either Etruscan presence in "Tyrsenian" Lemnos, or "Tyrsenian" expansion westward to Etruria.The Etruscan language was of a different family from that of neighbouring Italic and Celtic peoples, who spoke Indo-European languages.Modern archaeologists have come to suggest that the history of the Etruscans can be traced relatively accurately, based on the examination of burial sites, artifacts, and writing.