re pre-greek language

[Damien Erwan Perrotin]

There is many problems about the pre-greek languages of the Aegean, and
Linear A is only one of them.
Linear A is autochtonous and cannot be derived from cuneifor or
hieroglyph, so it must have evolved from local pictograms and thus
reflects the language it was first designed for (even if it was not
perfect). But that is not the main reason for thinking that the
indigenous language of Crete was not Greek.
First, there is an handfull of late inscription in the Greek script
transcripting a local language (notably at Phraisos) which has not been
dechiphered.
Second there is medical egyptian payrus quoting a formula "in the
language of keftiou", while not vocalized, this formula is not Greek.
Third there is the toponymy of Crete (and of a great part of mainland
Greece. This toponymy is not Greek. The problem is that a number of
place-names can be interpreted as IE, while not greek : thus
knossos : the hill (Irish cnoc, Old English hnec)
Argissa : the white place (from *arg-)
Gortyne : the closed place (IE *ghert-).

these toponyms are found in the central mediteranea area, up to Etruria
(Crotona, Cortuna), but that could an effect from the sea people
invasion or not.
fourth, Greek borrowed words from other languages, notably technical
terms as well as words related to an "aristocratic way of life"
(bathroom, whore...). At least one of these tongues was etruscan-like
(Greek opuiein versus Etruscan puia).
fifth : at least one Aegean language was recorded : lemnian, known
through a rather obscure stele. It seems close to Etruscan.
So, it is unlikely (at best) that Greek was the only language in the
region even during classical times, and unlikelier that it was the
tongue of the minoan state(s)
Personnally, I would favor a peri-indo-european etruscan like hypothesis
(because of the toponymy, but proofs are lacking for that.