U+01A1 "ơ" Latin Small Letter O with Horn Unicode Character

U+01A1 "ơ" Latin Small Letter O with Horn is a modified Latin letter used prominently in the Vietnamese alphabet, where it represents the sound of a mid-back rounded vowel with a distinctive horn-shaped diacritic attached to the upper right side of the letter "o". This character is essential for writing many Vietnamese words, distinguishing it from the plain "o" in the language's tonal system and appearing in common terms like "cơm" (rice) and "mới" (new). Its design originates from the adaptation of the Latin script to Vietnamese phonology, and it is encoded in the Latin Extended-B block of Unicode to support accurate digital text representation.