def _is_hangul_syllable(i):
    """
    Function for determining if a Unicode scalar value i is within the range of Hangul syllables.

    :param i: Unicode scalar value to lookup
    :return: Boolean: True if the lookup value is within the range of Hangul syllables, otherwise False.
    """
    if i in range(0xAC00, 0xD7A3 + 1):  # Range of Hangul characters as defined in UnicodeData.txt
        return True
    return False