Ignis-quis-vir's Proto-Language

Vowels
Your language has a vertical vowel system; that means that your language does only distinguish between high vowels (marked in yellow), middle vowels (marked in orange) and low vowels (marked in pink). The backness and roundedness of the vowels does not change the meaning of words. Which type of vowel is used depends on the consonants that precede the vowel.

Consonants
Vowels following consonants marked in blue are front vowels, vowels following consonants marked in green are central vowels and vowels following consonants marked in red are red vowels. In a consonant cluster, the vowel changes according to the last consonant in the cluster.