U+1A66 "ᩦ" Tai Tham Vowel Sign Ii Unicode Character

U+1A66 "ᩦ" Tai Tham Vowel Sign Ii is a combining diacritical mark used in the Tai Tham script, which historically writes the Northern Thai (Lanna), Tai Lü, and Khün languages. This specific vowel sign indicates a long "ii" sound, and it is written above the consonant it modifies. As part of the Tai Tham block in Unicode, it supports the accurate digital representation of classical and modern texts in these languages, preserving their unique orthographic traditions. Its codepoint allows for consistent encoding across digital platforms, enabling users to type, display, and search for these scripts without reliance on custom fonts.