Arelian

Classification and Dialects
Arelian (Arelex) is an a priori, tripartite, engineerined language with fluid parts of speech; only one morpheme in a word determines part of speech, and words can be freely converted between nouns, verbs, adverbs, adjectives, participles, and even pronouns.

Vowels
In addition to these vowels, there are two dipthongs -- /ai/ and /ʌu/

Writing System
Two pronunciations simply indicates allophony to conform to surrounding sounds