Comparative linguists view Hesychius’s lexicon as an indispensable empirical dataset for reconstructing non-Attic Greek dialects. Because the text preserves rare Doric, Aeolic, and Macedonian glosses, it provides phonetic and morphological clues that do not appear in standard literary texts. These glosses allow historical linguists to map Indo-European sound laws and dialectal divergence across the Mediterranean basin, bypassing the distorting filter of the standardized Attic koine.