[Glen] Doesn't look like Tartessian is
Tyrrhenian at all. It doesn't show telltale signs of Tyrrhenian grammar. It
looks more Vasconic than anything, relatable to Basque.
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[Davius] The few Sudlusitanian (i.e. Tartessina)
inscriptions I know do not seem to share the typical sound of Iberian or Basque.
It seems to have existed a kind of Ibero-Basque Sprachbund reflected in the
frequences of distribution of some phonemes, the lack of a contrast between
voice/voiceless sounds, the lack of long vowels, and similar configurations of
syllable strcuture.
You can see at this link for some interesting
information about Hispanic pre-Latin languages: