5 vowels — always the same sound
13 consonants
Rules
Every syllable is one consonant + one vowel (like "ma", "to", "ki") or a lone vowel ("a", "o"). No consonant clusters. No closed syllables. Every human on earth can pronounce this.
Stress: always on the first syllable of each word. No exceptions.
To help mark word boundaries across different native languages, the last syllable of each word should be slightly prolonged (~50% longer). This makes it easy to tell where one word ends and the next begins.
g is always hard (as in "go"), never soft (not like "gem").
s is always voiceless (as in "sun"), never buzzing (not like "rose").
j always sounds like English "y" (yes, yard). Never like "jump".
Flexibility
Pronunciation is intended to be flexible. If a sound is unfamiliar in your native language, use the closest sound available to you. For example: if you cannot produce z (voiced s), use š ("sh"). If w is difficult, use u or v instead. The goal is mutual understanding, not perfect replication.