U+1878 "ᡸ" Mongolian Letter Cha with Two Dots Unicode Character

U+1878 "ᡸ" Mongolian Letter Cha with Two Dots is a rarely used letter in the Mongolian script, specifically representing a voiced palatal affricate or fricative sound, akin to the "j" in "jump," and is primarily found in historical or specialized orthographies. It functions as a diacritically modified version of the standard Mongolian letter "Cha," with the two dots, known as a diaeresis or umlaut, indicating a distinct phonetic quality. This character is part of the Mongolian block in Unicode, included to support accurate digital representation of older or dialectal Mongolian texts, particularly those documenting the Khitan or Manchu languages. Due to its niche usage, it is absent from most common fonts and keyboards, making it a challenge to render consistently in modern digital environments.