2.1.529 Part 1 Section 17.18.24, ST_Em (Emphasis Mark Type)
a. The standard does not state which language should be used for the language resolution part of the emphasis mark values.
Word uses the East Asian language for the language resolution part of these values.
b. The standard states that the dot value specifies that the emphasis mark is to be rendered using Unicode character 0xFF0E for Japanese and Simplified Chinese, 0x2027 for Traditional Chinese, and 0x02D9 for all other East Asian languages.
In Word, the emphasis mark is rendered using Unicode character 0x02D9 for Korean, 0x2027 for Traditional Chinese, and 0xFF0E for all other East Asian languages.
c. The standard specifies that Traditional Chinese shall use Unicode character 0x3002 for the circle value and that it shall be positioned beneath the characters.
Word does not place the circle emphasis beneath the characters for Traditional Chinese.
d. The standard specifies that the emphasis mark is a comma character, rendered above each character, using Unicode character 0x3001.
In Word, a circle type is used instead of the comma type if the East Asian language of the text is Korean or Traditional Chinese.