IANAL, but if the language family, period spoken and geography of a given ancient language is known, then there are many cues to suggest a pronunciation, if the

IANAL, but if the language family, period spoken and geography of a given ancient language is known, then there are many cues to suggest a pronunciation, if the language familys history is well documented. And sometimes you find documents that have cues about correct (and incorrect) pronunciation in the language itself (ancient greek has many such text, for example). One may also get cues from the pronunciation of the modern language in the ancient area of the language of which he is trying to discover phonetics.