Aegean languages in the Bronze Age

The pre-Greek substrate (or substratum) consists of the unknown pre-Greek language or languages (either Pre-Indo-European or other Indo-European languages) spoken in prehistoric Greece prior to the emergence of the Proto-Greek language in the region c.during the Early Helladic period. About 1,000 words of Greek vocabulary cannot be adequately explained as derivatives from Proto-Greek or Proto-Indo-European, leading to the substratum hypothesis. According to scholars, Ancient Greek was likely influenced by two types of substrates: one Indo-European, probably an unknown Anatolian language that has been called "Parnassian", and one or several non-Indo-European languages that pre-date the coming of Greeks to the region.

Linear B is a syllabic script that was used for writing in Mycenaean Greek, the earliest attested form of the Greek language. The script predates the Greek alphabet by several centuries, the earliest known examples dating to around 1450 BC. It is adapted from the earlier Linear A, an undeciphered script perhaps used for writing the Minoan language, as is the later Cypriot syllabary, which also recorded Greek. Linear B, found mainly in the palace archives at Knossos, Kydonia, Pylos, Thebes and Mycenae, disappeared with the fall of Mycenaean civilization during the Late Bronze Age collapse. The succeeding period, known as the Greek Dark Ages, provides no evidence of the use of writing.