U+114BB Tirhuta Vowel Sign Ai

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The Tirhuta or Maithili script was the primary historical script for the Maithili language, as well as one of the historical scripts for Sanskrit. It is believed to have originated in the 13th century CE. It is very similar to Bengali–Assamese script, with most consonants being effectively identical in appearance. For the most part, writing in Maithili has switched to the Devanagari script, which is used to write neighbouring Central Indic languages to the west and north such as Hindi and Nepali, and the number of people with a working knowledge of Tirhuta has dropped considerably in recent years.