Taechatder

Consonants
Like some Slavic languages, consonant phonemes except /ð/ and /ʔ/ come in hard–soft pairs. In the orthography, soft consonants are marked by the letter y, similar to Hungarian diagraphs ty, gy, ly, ny. The letter y changes to e or i when soft consonants are placed between a consonant and a vowel.

Vowel Harmony
There are two classes of vowels in Taechatder: Opened and Closed.

The vowels of every affix attached before and after stems are determined by the class of vowels in the stems.