The Paleohispanic scripts are classified into three major groups: southern, northern, and Greco-Iberian, with differences in both the shapes of the glyphs and their values.

On the other hand, the continuants (fricatives like /s/ and sonorants like /l/, /m/, trills, and vowels) were written with simple alphabetic letters, as in Phoenician and Greek.

If correct, this innovation would parallel the creation of the Latin letter G by the addition of a stroke to C, which had previously stood for both /k/ and /g/.

This redundant typology re-emerged in a few late (2nd and 1st century BCE) texts of northeastern Iberian and Celtiberian scripts, where vowels were once again written after plosives.

(This Etruscan convention is preserved in the English, not only in qu for queen, but also the letter names cee, kay, cue/qu.)

The only known full Paleohispanic signary, on the undated Espanca tablet (not completely readable, but clearly related to the southwestern and southeastern scripts), follows the Phoenician/Greek order for the first 13 of its 27 letters: Α Β Γ Δ Ι Κ Λ Μ Ν Ξ Π?

The fact that southern paleohispanic /e/ appears to derive from the Phoenician letter ‘ayin, which gave rise to Greek Ο, while southern iberian /o/ derives from another letter or was perhaps invented,[4] suggests that the development of vowels in Paleohispanic semi-syllabaries was independent of the Greek innovation.

However, the order of what appears to be /u/ directly after Τ, rather than at the place of Ϝ, has suggested to some researchers a Greek influence.

Among the velar consonants, ka/ga of southeastern Iberian and the southwestern script derives from Phoenician/Greek Γ, ke/ge from Κ, and ki/gi from Ϙ,[4] while ko/go (perhaps coincidentally) resembles Greek Χ (pronounced [kʰ]).

[4] On 24 June 2024, it was announced that a software engineer had discovered further letters accidentally on a stone slab by scrolling through social media.