U+1A6C "ᩬ" Tai Tham Vowel Sign Oa Below Unicode Character

U+1A6C "ᩬ" Tai Tham Vowel Sign Oa Below is a combining diacritical mark used in the Tai Tham script, which is historically employed to write languages such as Northern Thai (Lan Na), Tai Lue, and Khün. This specific vowel sign is placed beneath a consonant to represent the phoneme "oa" or a similar diphthong sound, altering the syllable's pronunciation from its inherent vowel. Its inclusion in the Unicode Standard ensures that digital text in these traditional Southeast Asian scripts can be accurately encoded, preserved, and rendered across modern platforms and fonts.