How did vowel harmony affect the spelling of Etruscan words?

A characteristic feature of the Etruscan language was a marked tendency toward qualitative vowel harmony, which influenced how words were spelled by making the vowels within a word similar or identical to one another.1

This phenomenon can be observed when comparing Etruscan spellings to their Greek counterparts. For example, the Greek name Klutaimēstra, if transliterated directly, would result in cluthemestha; however, it appears in Etruscan records as cluthumustha and clutmsta. Similarly, the Greek name Poludeukēs is rendered as Pultuce in Etruscan, reflecting the application of this vowel harmony.1

This tendency toward harmony was part of a broader orthographic system that sometimes favored economical spelling, occasionally leading to consonant clusters that may have been far removed from the actual pronunciation, which likely involved the inclusion of lightly stressed vowels during speech.1